BE543085A - - Google Patents

Info

Publication number: BE543085A
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.)

1954-12-30

Publication of BE543085A publication Critical patent/BE543085A/xx

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/76—Compensating for differences in line impedance

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Interface Circuits In Exchanges (AREA)
Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Devices For Supply Of Signal Current (AREA)

BE543085D 1954-12-30 BE543085A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US478713A US2831067A (en)	1954-12-30	1954-12-30	Subscriber telephone set

Publications (1)

Publication Number	Publication Date
BE543085A true BE543085A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family

ID=23901078

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE543085D BE543085A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)	1954-12-30

Country Status (5)

Country	Link
US (1)	US2831067A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1)	BE543085A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1)	DE1100702B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1)	FR1134091A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1)	GB787824A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
BE560458A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) *	1954-02-08
US3046353A (en) *	1956-11-10	1962-07-24	Autophon Ag	Telephone sub-station including microphone amplifier
BE621155A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) *	1961-08-07
US3621142A (en) *	1969-06-05	1971-11-16	Bunting Sterisystems Inc	Single wire dc communicating means

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB700238A (en) *	1948-12-24	1953-11-25	Western Electric Co	Circuits employing semiconductor amplifier devices
GB679875A (en) *	1949-03-16	1952-09-24	Siemens Ag	Improvements in or relating to an arrangement for telephone subscribers sets
DE862917C (de) *	1951-07-12	1953-01-15	Siemens Ag	Fernsprechstation mit Kohlemikrofon und Speisung vom Amt

0
- BE BE543085D patent/BE543085A/xx unknown
1954
- 1954-12-30 US US478713A patent/US2831067A/en not_active Expired - Lifetime
1955
- 1955-07-11 FR FR1134091D patent/FR1134091A/fr not_active Expired
- 1955-11-02 DE DEW17763A patent/DE1100702B/de active Pending
- 1955-12-20 GB GB36452/55A patent/GB787824A/en not_active Expired

Also Published As

Publication number	Publication date
US2831067A (en)	1958-04-15
GB787824A (en)	1957-12-18
DE1100702B (de)	1961-03-02
FR1134091A (fr)	1957-04-05

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