JPH0924209A - Filter equipped with memory - Google Patents

Filter equipped with memory

Info

Publication number
JPH0924209A
JPH0924209A JP8182046A JP18204696A JPH0924209A JP H0924209 A JPH0924209 A JP H0924209A JP 8182046 A JP8182046 A JP 8182046A JP 18204696 A JP18204696 A JP 18204696A JP H0924209 A JPH0924209 A JP H0924209A
Authority
JP
Japan
Prior art keywords
filter
storage device
information
series
cartridge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP8182046A
Other languages
Japanese (ja)
Inventor
Roger Edward Page
ロジャー・エドワード・ページ
George B Peacock
ジョージ・ブランドウッド・ピーコック
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pall Corp
Original Assignee
Pall Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GBGB9514089.3A external-priority patent/GB9514089D0/en
Priority claimed from GBGB9516893.6A external-priority patent/GB9516893D0/en
Application filed by Pall Corp filed Critical Pall Corp
Publication of JPH0924209A publication Critical patent/JPH0924209A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/143—Filter condition indicators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
    • A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/50—General characteristics of the apparatus with microprocessors or computers
    • A61M2205/52—General characteristics of the apparatus with microprocessors or computers with memories providing a history of measured variating parameters of apparatus or patient
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/60—General characteristics of the apparatus with identification means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/70—General characteristics of the apparatus with testing or calibration facilities
    • A61M2205/707—Testing of filters for clogging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/52—Filter identification means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/54—Computerised or programmable systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/56—Wireless systems for monitoring the filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/58—Power supply means for regenerating the filter

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Filtration Of Liquid (AREA)

Abstract

PROBLEM TO BE SOLVED: To precisely determine a point of time for replacement of a filter by providing the filter with a storage device, in which a series of electronically readable information is stored, in a filter cartridge. SOLUTION: A filter cartridge comprises a filter device made of a polymer material and provided with two end caps 11. Each end cap 11 is formed from plastic material. One of the caps 11 receives one of ends of polymer filter medium 10, while the other end cap 11 receives the other end of the medium 10. The end caps 11 make is possible to mount the filter cartridge to a housing. One of the end caps 11 includes a storage device 12, in which a series of electronically readable information is stored. If the information in the device 12 is read out, a filter can be replaced at a proper point of time.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】この発明はフィルタに関係し
ている。TECHNICAL FIELD This invention relates to filters.

【０００２】[0002]

【従来の技術】フィルタは、大抵の場合、特定の応用装
置のために設計されている。例えば、血液フィルタ又は
熱及び湿気交換フィルタのような特定の医用応用装置に
おける使用のために設計されたフィルタがあり、又潤滑
油の濾過若しくは飲料の濾過のような特定の工業的応用
のために設計されたフィルタがある。すべての場合に、
正しいフィルタが特定の応用のために使用されることが
重要である。ある場合には、非常に類似して見えるが異
なった特性を持っているフィルタが並行して使用され得
る。フィルタは関連のフィルタの特性に関する情報を与
える包装法で包装されることができるが、いったんフィ
ルタが包装から取り出されると、望まれた応用のために
適当であるフィルタが使用されているかどうかを知るこ
とは困難なことがある。Filters are most often designed for a particular application. For example, there are filters designed for use in certain medical application devices such as blood filters or heat and moisture exchange filters, and for certain industrial applications such as lubricating oil filtration or beverage filtration. There is a designed filter. In all cases,
It is important that the correct filter be used for the particular application. In some cases, filters that look very similar but have different characteristics may be used in parallel. The filter can be packaged in a packaging method that gives information about the properties of the filter involved, but once the filter is unpacked, it is known whether the filter is suitable for the desired application. Things can be difficult.

【０００３】ハウジング内にフィルタカートリッジを含
んでいて、このハウジングがフィルタ性能を監視するセ
ンサを含んでいるフィルタ組立体を提供することが以前
に提案された。例えば、ＵＳ−Ａ−４６２６３４４では
ハウジングはエンジンオイルが限られてきて交換を必要
とする時を検出するためのセンサを備えている。ＵＳ−
Ａ−４００６０８３はフィルタカートリッジが詰まった
時を決定するためにハウジングにおけるスイッチを有し
ている。ＵＳ−Ａ−４５７８１８６は圧力の増大を決定
するためにハウジングのフィルタ入口ポートに圧力感知
スイッチを持っている。ＧＢ−Ａ−９８３７５０はフィ
ルタカートリッジ及び詰まりを検出するためのハウジン
グの入口通路におけるスイッチを含んでいる燃料注入シ
ステムを開示している。ＵＳ−Ａ−５０６１３６４はフ
ィルタカートリッジを取り囲んでいて、これを横切る交
番電磁界を発生する構成部分を開示している。渦電流検
出器がフィルタカートリッジにおける粒子により引き起
こされた電磁界の変化を検出する。ＵＳ−Ａ−３９３６
２８４はハウジングの入口室及び出口室における圧力の
変化を監視するためにハウジングに取り付けられた表示
器を開示している。ＵＳ−Ａ−５１９２４２４は識別マ
ークを保護した標識を備えたフィルタカートリッジを開
示している。It has previously been proposed to provide a filter assembly that includes a filter cartridge within a housing, the housing including a sensor for monitoring filter performance. For example, in US-A-4626344, the housing is equipped with a sensor to detect when engine oil is limited and needs to be replaced. US-
The A-4006083 has a switch in the housing to determine when the filter cartridge is jammed. US-A-4578186 has a pressure sensitive switch at the filter inlet port of the housing to determine the increase in pressure. GB-A-983750 discloses a fuel injection system that includes a filter cartridge and a switch in the inlet passage of the housing for detecting clogging. US-A-5061364 discloses a component which encloses a filter cartridge and which produces an alternating electromagnetic field across it. An eddy current detector detects changes in the electromagnetic field caused by particles in the filter cartridge. US-A-3936
284 discloses an indicator mounted on the housing to monitor changes in pressure in the inlet and outlet chambers of the housing. US-A-5192424 discloses a filter cartridge with an indicia-protected marking.

【０００４】[0004]

【発明が解決しようとする課題】フィルタは特定の環境
において機能するように設計され且つ無限の時間持続し
ないように設計される。環境が変化するか又はフィルタ
がもはや有効に機能しない状態に達したならば、フィル
タは、除去されて取り替えられることが必要である。一
般に、これはフィルタの動作状態を監視することによっ
て且つフィルタにおける圧力低下を観察することによっ
て決定される。しかしながら、これはフィルタの動作状
態の近似的表示を与えることができるにすぎない。Filters are designed to work in a particular environment and not last for an infinite amount of time. If the environment changes or the filter reaches a state where it no longer works effectively, the filter needs to be removed and replaced. Generally, this is determined by monitoring the operating condition of the filter and observing the pressure drop across the filter. However, this can only give an approximate indication of the operating state of the filter.

【０００５】従って、この発明は、交換の時点を正確に
決定できるフィルタを提供することを目的としている。Therefore, the object of the present invention is to provide a filter capable of accurately determining the time of exchange.

【０００６】[0006]

【課題を解決するための手段】この発明の第１の態様に
従って、電子的に読取り可能な一連の情報を収容した記
憶装置を含んでいるフィルタカートリッジを備えたフィ
ルタが準備されている。According to a first aspect of the present invention, there is provided a filter including a filter cartridge including a storage device containing a series of electronically readable information.

【０００７】一態様においては、この一連の情報はフィ
ルタの特性に関する情報であればよく、従って、例えば
正しいフィルタが特定の応用のために使用されているど
うかを電子的に決定することができる。In one aspect, this set of information can be information about the characteristics of the filter, and thus, for example, it can be electronically determined whether the correct filter is being used for a particular application.

【０００８】記憶装置が入力装置と関連していて、この
入力装置が記憶装置から電子的に読み取られることので
きる一連の情報を記憶装置に供給することが望ましい。It is desirable for a storage device to be associated with an input device and to provide the storage device with a set of information that can be electronically read from the storage device.

【０００９】入力装置は、例えばフィルタが設計外の温
度範囲が動作しているときを決定することができ、及び
／又はフィルタが詰まった状態になっているときを決定
することができる。それゆえに記憶装置における情報を
読み取れば、適当な時点でフィルタを交換することが可
能になる。The input device can determine, for example, when the filter is operating in an out-of-design temperature range, and / or when the filter is in a clogged condition. Therefore, reading the information in the storage device allows the filter to be replaced at a suitable time.

【００１０】[0010]

【発明の実施の形態】次は、例としての、添付の諸図面
を参照しての、この発明の実施例の一層詳細な説明であ
る。The following is a more detailed description of embodiments of the invention, by way of example, with reference to the accompanying drawings.

【００１１】図１を参照すると、フィルタカートリッジ
は二つの端部キャップ１１を備えた重合体材料のフィル
タ媒質１０からなっている。各端部キャップ１１はプラ
スチック材料から形成されている。一方の端部キャップ
１１は重合体フィルタ媒質１０の端部の一方を受け且つ
他方の端部キャップ１１はフィルタ媒質１０の端部の他
方を受けている。端部キャップ１１はフィルタカートリ
ッジがハウジング（図示されていない）に取り付けられ
ることを可能にする。Referring to FIG. 1, a filter cartridge comprises a polymeric material filter medium 10 having two end caps 11. Each end cap 11 is made of a plastic material. One end cap 11 receives one of the ends of the polymeric filter medium 10 and the other end cap 11 receives the other end of the filter medium 10. The end cap 11 allows the filter cartridge to be mounted in a housing (not shown).

【００１２】一方の端部キャップ１１は電子的に読取り
可能な一連の情報を収容した記憶装置１２を備えてい
る。One end cap 11 comprises a storage device 12 containing a series of electronically readable information.

【００１３】図２に示された一実施例においては、記憶
装置１２はフィルタの特性に関する情報を収容した電子
的な読出専用記憶装置（ＲＯＭ）である。フィルタ特性
は、フィルタの物理的寸法及び／又はそれの定格、及び
／又は参照番号、製造業者の詳細事項、動作温度範囲、
安全性情報若しくは動作上の説明のようなその他の情報
であり得よう。記憶装置は適当な読取り装置からの呼掛
け信号の受信時にこの読取り装置にこの一連の情報を送
信する送信機又はトランスポンダ１３と関連している。In the embodiment shown in FIG. 2, storage device 12 is an electronic read only storage device (ROM) containing information regarding the characteristics of the filter. The filter characteristics may include the physical dimensions of the filter and / or its rating, and / or reference numbers, manufacturer details, operating temperature range,
It could be safety information or other information such as operational instructions. The storage device is associated with a transmitter or transponder 13 which sends this series of information to the reader upon receipt of an interrogation signal from the appropriate reader.

【００１４】又は、記憶装置１２は読取り装置と記憶装
置との間の物理的電気的接続を可能にする出力装置と関
連していてもよい。この接続は永続的な配線接続であっ
てもよい。又は、記憶装置には読取り装置と記憶装置と
の間の電気的接続を可能にするために取り外されること
のできるカバーを準備することもできるであろう。別の
可能性は適当なコネクタによってカバーを突き刺してコ
ネクタと記憶装置との間の電気的接続を可能にすること
である。Alternatively, the storage device 12 may be associated with an output device that allows a physical and electrical connection between the reading device and the storage device. This connection may be a permanent wire connection. Alternatively, the storage device could be provided with a cover that can be removed to allow an electrical connection between the reader and the storage device. Another possibility is to pierce the cover with a suitable connector to allow an electrical connection between the connector and the storage device.

【００１５】図３に示された代替的構成においては、記
憶装置１２は、記憶装置から電子的に読み取られること
のできる一連の電子的情報を記憶装置１２に供給するた
めに電気的モニタ１４の形態をした入力装置と関連して
いる。例えば、電気的モニタ１４は、フィルタ要素１０
の詰まりを検出することができ、又は温度若しくは圧力
若しくはフィルタに関する他の任意所望の可変パラメー
タを監視することができるであろう。In the alternative configuration shown in FIG. 3, the storage device 12 includes an electrical monitor 14 to provide the storage device 12 with a series of electronic information that can be electronically read from the storage device. Associated with a shaped input device. For example, electrical monitor 14 may include filter element 10
Could be detected, or temperature or pressure or any other desired variable parameter for the filter could be monitored.

【００１６】更なる可能性は、酵素、蛋白質、抗体、抗
原、細菌、ウイルスのような生化学物質を検出する電気
的センサを備えて、この生化学物質に関係した一連の電
気的情報を発生することである。この情報は特定の生化
学物質の存在を同定するために及び／又は完全性測定値
として及び／又はフィルタへの流体の供給を制御するた
めに若しくはフィルタからの流出物を制御するために使
用されることができる。電子的記憶装置１２は単にこの
ようなモニタ１４若しくはセンサから一連の電気的情報
を受けるか又はこの情報を受け且つ図１を参照して上に
記述された種類のフィルタ１０に関する情報を含むこと
ができるであろう。別の可能性はモニタ１４からの電子
的データを処理して出力データを記憶装置１２に記憶す
るために電子計算機１７を含めることである。A further possibility is to provide an electrical sensor for the detection of biochemicals such as enzymes, proteins, antibodies, antigens, bacteria, viruses and generate a series of electrical information related to this biochemical. It is to be. This information is used to identify the presence of a particular biochemical and / or as an integrity measure and / or to control the supply of fluid to the filter or to control the effluent from the filter. You can Electronic storage 12 may simply receive a series of electrical information from such a monitor 14 or sensor, or may receive this information and include information regarding filter 10 of the type described above with reference to FIG. You can do it. Another possibility is to include an electronic calculator 17 for processing the electronic data from the monitor 14 and storing the output data in the storage device 12.

【００１７】この情報は上述のように電気的送信機１３
によって又は図２に関して上に記述された方法のいずれ
かで読取り装置の入力装置１６と物理的接触をする電気
的出力装置１５によって出力されることができる。This information is sent to the electrical transmitter 13 as described above.
Or by an electrical output device 15 in physical contact with the input device 16 of the reader in any of the ways described above with respect to FIG.

【００１８】記憶装置１２は、特定の検出パラメータが
所定の限界値を超えたときに、電子的警報信号を送信す
るようにプログラムされることができるであろう。The storage device 12 could be programmed to send an electronic alert signal when certain detection parameters exceed predetermined limits.

【００１９】図面を参照して上に記述された実施例のい
ずれかにおいて、記憶装置１２及びこれの関連の構成部
分（準備されている場合には計算機１７を含む）は単一
の電子的チップ上に形成されることができる。別の方法
として、記憶装置１２はリモートセンサから又は手動操
作式入力装置から遠隔操作により書き込まれることがで
きるであろう。手動操作式入力装置は、例えば、フィル
タ１０により経験された循環過程の数に対応する電子的
信号を記憶装置１２に入力するために使用されることが
できるであろう。記憶装置１２はそれ自体の電源、例え
ば電池と、関連していてもよい。In any of the embodiments described above with reference to the drawings, the memory device 12 and its associated components (including the computer 17 if provided) are a single electronic chip. Can be formed on. Alternatively, the storage device 12 could be written remotely from a remote sensor or from a manually operated input device. A manually operated input device could, for example, be used to input an electronic signal into the memory device 12 corresponding to the number of cyclic processes experienced by the filter 10. Storage device 12 may be associated with its own power source, such as a battery.

【００２０】一般に、もちろん、情報は情報のビットの
ストリングとして二進形式で記憶される。望ましくはそ
れは１００ビットより多い情報であり、より望ましくは
１０００ビットより多い情報である。In general, of course, the information is stored in binary form as a string of bits of information. Preferably it is more than 100 bits of information, more preferably more than 1000 bits of information.

【００２１】上に記述された記憶装置はいずれも、フィ
ルタ媒質を備え且つ端部キャップが任意の適当な材料で
できている図１に示されたカートリッジ以外のフィルタ
カートリッジについて使用されることができるであろ
う。更に、記憶装置は端部キャップにおける以外にカー
トリッジの一部分に組み込まれることができるであろ
う。それはフィルタ媒質に組み込まれることもできるで
あろう。最終の出力は電子的である必要はなく、電子的
に読取り可能な情報は音声に変換されることができるで
あろう。Any of the storage devices described above can be used with filter cartridges other than the cartridge shown in FIG. 1 that includes a filter medium and the end caps are made of any suitable material. Will. Further, the storage device could be incorporated into a portion of the cartridge other than at the end cap. It could also be incorporated into the filter medium. The final output need not be electronic and the electronically readable information could be converted to voice.

【図面の簡単な説明】[Brief description of drawings]

【図１】フィルタカートリッジの断面図。FIG. 1 is a sectional view of a filter cartridge.

【図２】図１のカートリッジと共に使用可能な第１記憶
装置の概略図。2 is a schematic diagram of a first storage device usable with the cartridge of FIG.

【図３】図１のカートリッジと共に使用可能な第２記憶
装置の概略図。FIG. 3 is a schematic diagram of a second storage device that can be used with the cartridge of FIG.

【符号の説明】[Explanation of symbols]

１０ フィルタ媒質 １１ 端部キャップ １２ 記憶装置 １３ 送信機 １４ モニタ 10 Filter Medium 11 End Cap 12 Storage Device 13 Transmitter 14 Monitor

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】 電子的に読取り可能な一連の情報を収容
した記憶装置（１２）を含んでいるフィルタカートリッ
ジ（１０、１１）を備えているフィルタ。1. A filter comprising a filter cartridge (10, 11) containing a storage device (12) containing a series of electronically readable information. 【請求項２】 記憶装置（１２）が読出専用記憶装置で
ある、請求項１に記載のフィルタ。2. The filter according to claim 1, wherein the storage device (12) is a read-only storage device. 【請求項３】 記憶装置（１２）が入力装置（１４）と
関連しており、入力装置（１４）が記憶装置（１２）か
らの電子的に読取り可能な一連の情報を記憶装置（１
２）に供給する、請求項１に記載のフィルタ。3. A storage device (12) is associated with an input device (14), the input device (14) providing a set of electronically readable information from the storage device (12).
The filter according to claim 1, which is supplied to 2). 【請求項４】 入力装置（１４）が、モニタ装置（１
４）により監視された可変パラメータに関する情報を記
憶装置（１２）に供給するためのモニタ装置（１４）で
ある、請求項３に記載のフィルタ。4. The input device (14) is a monitor device (1).
4. The filter according to claim 3, which is a monitor device (14) for supplying the storage device (12) with information on the variable parameters monitored by (4). 【請求項５】 記憶装置（１２）が、前記の一連の情報
を含む電気信号を送信するための送信機（１３）を含ん
でいる、請求項１から４までのいずれか一つに記載のフ
ィルタ。5. A storage device (12) according to any one of claims 1 to 4, wherein the storage device (12) comprises a transmitter (13) for transmitting an electrical signal containing said series of information. filter. 【請求項６】 記憶装置（１２）が、該記憶装置におけ
る一連の情報を読み取るための読取り装置（１７）への
接続のための出力接続部（１５）を含んでいる、請求項
１から５までのいずれか一つに記載のフィルタ。6. The storage device (12) comprises an output connection (15) for connection to a reading device (17) for reading a series of information in the storage device. Filter according to any one of.
JP8182046A 1995-07-11 1996-07-11 Filter equipped with memory Pending JPH0924209A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB9514089.3A GB9514089D0 (en) 1995-07-11 1995-07-11 Filters
GBGB9516893.6A GB9516893D0 (en) 1995-08-17 1995-08-17 Filters
GB9514089.3 1995-08-17
GB9516893.6 1995-08-17

Publications (1)

Publication Number Publication Date
JPH0924209A true JPH0924209A (en) 1997-01-28

Family

ID=26307366

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8182046A Pending JPH0924209A (en) 1995-07-11 1996-07-11 Filter equipped with memory

Country Status (5)

Country Link
JP (1) JPH0924209A (en)
CA (1) CA2180488A1 (en)
DE (1) DE19627595A1 (en)
FR (1) FR2736560A1 (en)
GB (1) GB2303082A (en)

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Also Published As

Publication number Publication date
FR2736560A1 (en) 1997-01-17
GB9614405D0 (en) 1996-09-04
DE19627595A1 (en) 1997-01-16
CA2180488A1 (en) 1997-01-12
GB2303082A (en) 1997-02-12

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