BE439942A - - Google Patents

Info

Publication number: BE439942A
Authority: BE; Belgium

Application number

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.)

1939-06-13

Publication of BE439942A publication Critical patent/BE439942A/xx

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/08—Arrangements for interconnection between switching centres for phantom working
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
- H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Computer Networks & Wireless Communication (AREA)
Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

BE439942D 1939-06-13 BE439942A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB215524X		1939-06-13

Publications (1)

Publication Number	Publication Date
BE439942A true BE439942A (en)

Family

ID=10164814

Family Applications (2)

Application Number	Title	Priority Date	Filing Date
BE439843D BE439843A (en)	1939-06-13
BE439942D BE439942A (en)	1939-06-13

Family Applications Before (1)

Application Number	Title	Priority Date	Filing Date
BE439843D BE439843A (en)	1939-06-13

Country Status (4)

Country	Link
BE (2)	BE439942A (en)
CH (2)	CH215524A (en)
FR (2)	FR947900A (en)
GB (2)	GB530621A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE972640C (en) *	1952-04-10	1959-08-27	Siemens Ag	Circuit arrangement for telecommunications systems for the simultaneous transmission of telephone currents and signals over the same line wires

0
- BE BE439843D patent/BE439843A/xx unknown
- BE BE439942D patent/BE439942A/xx unknown
1939
- 1939-06-13 GB GB17287/39A patent/GB530621A/en not_active Expired
- 1939-06-30 GB GB19118/39A patent/GB530669A/en not_active Expired
1940
- 1940-06-06 CH CH215524D patent/CH215524A/en unknown
- 1940-06-08 CH CH228092D patent/CH228092A/en unknown
1947
- 1947-06-13 FR FR947900D patent/FR947900A/en not_active Expired
- 1947-07-12 FR FR57449D patent/FR57449E/en not_active Expired

Also Published As

Publication number	Publication date
CH228092A (en)	1943-07-31
GB530669A (en)	1940-12-17
FR947900A (en)	1949-07-15
FR57449E (en)	1953-01-02
GB530621A (en)	1940-12-17
BE439843A (en)
CH215524A (en)	1941-06-30

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