BE362519A - - Google Patents

Info

Publication number: BE362519A
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.)

1928-07-20

Publication of BE362519A publication Critical patent/BE362519A/xx

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/40—Applications of speech amplifiers

Landscapes

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

BE362519D 1928-07-20 BE362519A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB21064/28A GB324328A (en)	1928-07-20	1928-07-20	Improvements in telephone systems

Publications (1)

Publication Number	Publication Date
BE362519A true BE362519A (enrdf_load_stackoverflow)

Family

ID=10156588

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE362519D BE362519A (enrdf_load_stackoverflow)	1928-07-20

Country Status (5)

Country	Link
US (2)	US1763013A (enrdf_load_stackoverflow)
BE (1)	BE362519A (enrdf_load_stackoverflow)
DE (1)	DE636403C (enrdf_load_stackoverflow)
FR (1)	FR680025A (enrdf_load_stackoverflow)
GB (1)	GB324328A (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2601302A (en) *	1941-05-02	1952-06-24	Int Standard Electric Corp	Two-way wire telephone repeater circuit
US2564084A (en) *	1946-11-02	1951-08-14	Automatic Elect Lab	Telephone system having repeater insertion on long distance lines
US2550755A (en) *	1947-09-24	1951-05-01	Automatic Elect Lab	Toll switching telephone system

0
- US US19741D patent/USRE19741E/en not_active Expired
- BE BE362519D patent/BE362519A/xx unknown
1928
- 1928-07-20 GB GB21064/28A patent/GB324328A/en not_active Expired
1929
- 1929-07-03 US US375715A patent/US1763013A/en not_active Expired - Lifetime
- 1929-07-18 FR FR680025D patent/FR680025A/fr not_active Expired
- 1929-07-19 DE DEI38724D patent/DE636403C/de not_active Expired

Also Published As

Publication number	Publication date
DE636403C (de)	1936-10-13
USRE19741E (en)	1935-10-22
US1763013A (en)	1930-06-10
FR680025A (fr)	1930-04-24
GB324328A (en)	1930-01-20

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