BE431728A - - Google Patents

Info

Publication number
BE431728A
BE431728A BE431728DA BE431728A BE 431728 A BE431728 A BE 431728A BE 431728D A BE431728D A BE 431728DA BE 431728 A BE431728 A BE 431728A
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 BE431728A publication Critical patent/BE431728A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
BE431728D 1938-12-20 BE431728A (US07534539-20090519-C00280.png)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH214506T 1938-12-20

Publications (1)

Publication Number Publication Date
BE431728A true BE431728A (US07534539-20090519-C00280.png)

Family

ID=4448728

Family Applications (1)

Application Number Title Priority Date Filing Date
BE431728D BE431728A (US07534539-20090519-C00280.png) 1938-12-20

Country Status (2)

Country Link
BE (1) BE431728A (US07534539-20090519-C00280.png)
CH (1) CH214506A (US07534539-20090519-C00280.png)

Also Published As

Publication number Publication date
CH214506A (fr) 1941-04-30

Similar Documents

Publication Publication Date Title
BE428437A (US07534539-20090519-C00280.png)
BE425884A (US07534539-20090519-C00280.png)
BE131681A (US07534539-20090519-C00280.png)
BE414985A (US07534539-20090519-C00280.png)
BE420003A (US07534539-20090519-C00280.png)
BE420642A (US07534539-20090519-C00280.png)
BE422629A (US07534539-20090519-C00280.png)
BE423383A (US07534539-20090519-C00280.png)
BE423866A (US07534539-20090519-C00280.png)
BE425656A (US07534539-20090519-C00280.png)
BE425826A (US07534539-20090519-C00280.png)
BE428470A (US07534539-20090519-C00280.png)
BE425911A (US07534539-20090519-C00280.png)
BE426294A (US07534539-20090519-C00280.png)
BE426318A (US07534539-20090519-C00280.png)
BE426319A (US07534539-20090519-C00280.png)
BE426413A (US07534539-20090519-C00280.png)
BE426439A (US07534539-20090519-C00280.png)
BE426736A (US07534539-20090519-C00280.png)
BE426920A (US07534539-20090519-C00280.png)
BE428507A (US07534539-20090519-C00280.png)
BE427068A (US07534539-20090519-C00280.png)
BE427269A (US07534539-20090519-C00280.png)
BE427315A (US07534539-20090519-C00280.png)
BE427381A (US07534539-20090519-C00280.png)