BE438929A - - Google Patents

Info

Publication number
BE438929A
BE438929A BE438929DA BE438929A BE 438929 A BE438929 A BE 438929A BE 438929D A BE438929D A BE 438929DA BE 438929 A BE438929 A BE 438929A
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 BE438929A publication Critical patent/BE438929A/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)
  • Circuit For Audible Band Transducer (AREA)
BE438929D 1939-05-09 BE438929A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL865496X 1939-05-09

Publications (1)

Publication Number Publication Date
BE438929A true BE438929A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family

ID=19849261

Family Applications (1)

Application Number Title Priority Date Filing Date
BE438929D BE438929A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1939-05-09

Country Status (4)

Country Link
BE (1) BE438929A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE726437C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR865496A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL54610C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Also Published As

Publication number Publication date
NL54610C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR865496A (fr) 1941-05-24
DE726437C (de) 1942-10-14

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