BE435545A - - Google Patents

Info

Publication number
BE435545A
BE435545A BE435545DA BE435545A BE 435545 A BE435545 A BE 435545A BE 435545D A BE435545D A BE 435545DA BE 435545 A BE435545 A BE 435545A
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.)
Publication of BE435545A publication Critical patent/BE435545A/xx

Links

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 (en)

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 (en)

Family

ID=22824830

Family Applications (1)

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

Country Status (3)

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

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 (en) * 1955-02-17
US3126452A (en) * 1960-03-18 1964-03-24 Arrangement in telephone instruments

Also Published As

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

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