FR2040447B1 - - Google Patents
Info
- Publication number
- FR2040447B1 FR2040447B1 FR7015631A FR7015631A FR2040447B1 FR 2040447 B1 FR2040447 B1 FR 2040447B1 FR 7015631 A FR7015631 A FR 7015631A FR 7015631 A FR7015631 A FR 7015631A FR 2040447 B1 FR2040447 B1 FR 2040447B1
- Authority
- FR
- France
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/02—Microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/46—Special adaptations for use as contact microphones, e.g. on musical instrument, on stethoscope
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB21953/69A GB1277912A (en) | 1969-04-30 | 1969-04-30 | Electro-acoustic transducers |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2040447A1 FR2040447A1 (en) | 1971-01-22 |
FR2040447B1 true FR2040447B1 (en) | 1974-05-03 |
Family
ID=10171533
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7015631A Expired FR2040447B1 (en) | 1969-04-30 | 1970-04-29 |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS4823005B1 (en) |
DE (1) | DE2019520A1 (en) |
ES (1) | ES379238A1 (en) |
FR (1) | FR2040447B1 (en) |
GB (1) | GB1277912A (en) |
IL (1) | IL34068A (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3902262A (en) * | 1973-12-19 | 1975-09-02 | Burroughs Corp | Identification and/or credit card with flush mounted panels |
JPS5246724Y2 (en) * | 1974-06-20 | 1977-10-24 | ||
JPS5411605U (en) * | 1977-06-27 | 1979-01-25 | ||
JPS5363131A (en) * | 1977-07-04 | 1978-06-06 | Toshiba Corp | Identification card |
JPS5821468U (en) * | 1981-08-06 | 1983-02-09 | 凸版印刷株式会社 | card |
EP0500985A1 (en) * | 1991-02-27 | 1992-09-02 | Masao Konomi | Bone conduction microphone mount |
JP3958739B2 (en) * | 2003-12-12 | 2007-08-15 | Necトーキン株式会社 | Acoustic vibration generator |
DE102016206566A1 (en) * | 2016-04-19 | 2017-10-19 | Robert Bosch Gmbh | Micromechanical component and production method for a micromechanical component |
CN114449417B (en) * | 2020-10-30 | 2022-11-25 | 华为技术有限公司 | Speaker and electronic equipment |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE452217A (en) * | ||||
US2045427A (en) * | 1933-05-24 | 1936-06-23 | Sonotone Corp | Bone-conduction hearing-aid |
US3423543A (en) * | 1965-06-24 | 1969-01-21 | Harry W Kompanek | Loudspeaker with piezoelectric wafer driving elements |
-
1969
- 1969-04-30 GB GB21953/69A patent/GB1277912A/en not_active Expired
-
1970
- 1970-03-12 IL IL34068A patent/IL34068A/en unknown
- 1970-04-22 DE DE19702019520 patent/DE2019520A1/en active Pending
- 1970-04-23 JP JP45034316A patent/JPS4823005B1/ja active Pending
- 1970-04-29 FR FR7015631A patent/FR2040447B1/fr not_active Expired
- 1970-04-30 ES ES379238A patent/ES379238A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
ES379238A1 (en) | 1972-09-16 |
IL34068A (en) | 1973-06-29 |
GB1277912A (en) | 1972-06-14 |
IL34068A0 (en) | 1970-05-21 |
JPS4823005B1 (en) | 1973-07-10 |
DE2019520A1 (en) | 1970-11-12 |
FR2040447A1 (en) | 1971-01-22 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |