NL68231C - - Google Patents

Info

Publication number
NL68231C
NL68231C NL68231DA NL68231C NL 68231 C NL68231 C NL 68231C NL 68231D A NL68231D A NL 68231DA NL 68231 C NL68231 C NL 68231C
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 NL68231C publication Critical patent/NL68231C/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
NL68231D 1944-03-25 NL68231C (enrdf_load_html_response)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US528030A US2385515A (en) 1944-03-25 1944-03-25 Intercommunication system

Publications (1)

Publication Number Publication Date
NL68231C true NL68231C (enrdf_load_html_response)

Family

ID=24103974

Family Applications (1)

Application Number Title Priority Date Filing Date
NL68231D NL68231C (enrdf_load_html_response) 1944-03-25

Country Status (3)

Country Link
US (1) US2385515A (enrdf_load_html_response)
FR (1) FR938541A (enrdf_load_html_response)
NL (1) NL68231C (enrdf_load_html_response)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632056A (en) * 1947-12-30 1953-03-17 Rauland Corp Busy signal for intercommunicating telephone systems
US2547854A (en) * 1948-02-06 1951-04-03 Webster Electric Co Inc Intercommunication apparatus
US2744966A (en) * 1950-10-05 1956-05-08 Executone Inf Sys Inc Intercommunication system
US2802055A (en) * 1952-08-29 1957-08-06 Siemens Ag Two-way loudspeaker intercommunication system
US2741667A (en) * 1953-02-11 1956-04-10 Commercial Radio Sound Corp Privacy guarded telephone intercommunicating system
BE539028A (enrdf_load_html_response) * 1954-08-23

Also Published As

Publication number Publication date
US2385515A (en) 1945-09-25
FR938541A (fr) 1948-10-18

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