BE469898A - - Google Patents

Info

Publication number
BE469898A
BE469898A BE469898DA BE469898A BE 469898 A BE469898 A BE 469898A BE 469898D A BE469898D A BE 469898DA BE 469898 A BE469898 A BE 469898A
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 BE469898A publication Critical patent/BE469898A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
BE469898D 1944-02-19 BE469898A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3129/44A GB571908A (en) 1944-02-19 1944-02-19 Improvements in or relating to telephone or like systems

Publications (1)

Publication Number Publication Date
BE469898A true BE469898A (en)

Family

ID=9752463

Family Applications (1)

Application Number Title Priority Date Filing Date
BE469898D BE469898A (en) 1944-02-19

Country Status (3)

Country Link
US (1) US2475546A (en)
BE (1) BE469898A (en)
GB (1) GB571908A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR954202A (en) * 1946-10-11 1949-12-21 Automatic Elect Lab Automatic switching telephone system, especially for long distance calls
US3003040A (en) * 1956-01-25 1961-10-03 Gen Dynamics Corp Modified trunk circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1606199A (en) * 1923-09-18 1926-11-09 Western Electric Co Telephone-exchange system
US1829803A (en) * 1930-08-04 1931-11-03 Bell Telephone Labor Inc Telephone system
US2153654A (en) * 1935-06-15 1939-04-11 Panstwowe Zaklady Tele I Radjo System of tone-signaling and impulsing
GB534866A (en) * 1939-10-16 1941-03-20 Siemens Brothers & Co Ltd Improvements relating to telephone and like signalling systems
GB559016A (en) * 1942-07-28 1944-02-01 Automatic Telephone & Elect Improvements in or relating to telephone or like systems

Also Published As

Publication number Publication date
GB571908A (en) 1945-09-13
US2475546A (en) 1949-07-05

Similar Documents

Publication Publication Date Title
BE455763A (en)
BE457872A (en)
BE467075A (en)
BE469898A (en)
BE447901A (en)
BE432945A (en)
BE270897A (en)
BE257259A (en)
BE456879A (en)
BE455554A (en)
BE457018A (en)
BE456520A (en)
BE455531A (en)
NL81620C (en)
NL118030B (en)
LU28562A1 (en)
BE483859A (en)
BE455463A (en)
BE455204A (en)
BE466588A (en)
BE458785A (en)
BE455122A (en)
BE458233A (en)
BE458231A (en)
BE458211A (en)