NL81447C - - Google Patents

Info

Publication number
NL81447C
NL81447C NL81447DA NL81447C NL 81447 C NL81447 C NL 81447C NL 81447D A NL81447D A NL 81447DA NL 81447 C NL81447 C NL 81447C
Authority
NL
Netherlands
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 NL81447C publication Critical patent/NL81447C/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
    • H04Q1/48—Induced-current signalling arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Relay Circuits (AREA)
  • Interface Circuits In Exchanges (AREA)
NL81447D 1950-11-21 NL81447C ( )

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE705723X 1950-11-21
SE2712571X 1950-11-21
SE1048924X 1950-11-21

Publications (1)

Publication Number Publication Date
NL81447C true NL81447C ( )

Family

ID=27354992

Family Applications (1)

Application Number Title Priority Date Filing Date
NL81447D NL81447C ( ) 1950-11-21

Country Status (4)

Country Link
US (1) US2712571A ( )
BE (1) BE507213A ( )
GB (1) GB705723A ( )
NL (1) NL81447C ( )

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE624790A ( ) * 1962-03-01
DE1287162B (de) * 1964-08-17 1969-01-16 Int Standard Electric Corp Verfahren und Schaltungsanordnung zur Waehlziffernuebertragung ueber eine zwei Fernsprechzentralen verbindende zweiadrige Verbindungsleitung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2186315A (en) * 1937-04-19 1940-01-09 Siemens Ag Telephone system
US2236797A (en) * 1937-08-02 1941-04-01 Fides Gmbh Telephone system

Also Published As

Publication number Publication date
GB705723A (en) 1954-03-17
US2712571A (en) 1955-07-05
BE507213A ( )

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