BE435545A - - Google Patents

Info

Publication number: BE435545A
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.)

1938-07-22

Publication of BE435545A publication Critical patent/BE435545A/xx

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/58—Anti-side-tone circuits
- 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
- H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Telephonic Communication Services (AREA)
Telephone Set Structure (AREA)

BE435545D 1938-07-22 BE435545A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US220757A US2214259A (en)	1938-07-22	1938-07-22	Telephone substation apparatus

Publications (1)

Publication Number	Publication Date
BE435545A true BE435545A (enrdf_load_stackoverflow)

Family

ID=22824830

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE435545D BE435545A (enrdf_load_stackoverflow)	1938-07-22

Country Status (3)

Country	Link
US (1)	US2214259A (enrdf_load_stackoverflow)
BE (1)	BE435545A (enrdf_load_stackoverflow)
GB (1)	GB530257A (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2548723A (en) *	1945-07-13	1951-04-10	Kellogg Switchboard & Supply	Telephone set hook-switch apparatus
US2529418A (en) *	1947-06-25	1950-11-07	Automatic Elect Lab	Telephone substation apparatus for local, and common battery service
BE545243A (enrdf_load_stackoverflow) *	1955-02-17
NL262555A (enrdf_load_stackoverflow) *	1960-03-18

0
- BE BE435545D patent/BE435545A/xx unknown
1938
- 1938-07-22 US US220757A patent/US2214259A/en not_active Expired - Lifetime
1939
- 1939-06-02 GB GB16314/39A patent/GB530257A/en not_active Expired

Also Published As

Publication number	Publication date
US2214259A (en)	1940-09-10
GB530257A (en)	1940-12-09

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