LU72821A1 - - Google Patents

Info

Publication number
LU72821A1
LU72821A1 LU72821A LU72821A LU72821A1 LU 72821 A1 LU72821 A1 LU 72821A1 LU 72821 A LU72821 A LU 72821A LU 72821 A LU72821 A LU 72821A LU 72821 A1 LU72821 A1 LU 72821A1
Authority
LU
Luxembourg
Application number
LU72821A
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.)
Filing date
Publication date
Application filed filed Critical
Publication of LU72821A1 publication Critical patent/LU72821A1/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/02—Arrangements for interconnection not involving centralised switching involving a common line for all parties

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Mobile Radio Communication Systems (AREA)
LU72821A 1974-06-27 1975-06-25 LU72821A1 (enrdf_load_html_response)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT51772/74A IT1029547B (it) 1974-06-27 1974-06-27 Impianto interfonico con apparecchi in parallelo su unica linea bifilare

Publications (1)

Publication Number Publication Date
LU72821A1 true LU72821A1 (enrdf_load_html_response) 1975-09-29

Family

ID=11275703

Family Applications (1)

Application Number Title Priority Date Filing Date
LU72821A LU72821A1 (enrdf_load_html_response) 1974-06-27 1975-06-25

Country Status (9)

Country Link
JP (1) JPS5125003A (enrdf_load_html_response)
BE (1) BE830487A (enrdf_load_html_response)
DE (1) DE2528854A1 (enrdf_load_html_response)
DK (1) DK291475A (enrdf_load_html_response)
FR (1) FR2276755A1 (enrdf_load_html_response)
IT (1) IT1029547B (enrdf_load_html_response)
LU (1) LU72821A1 (enrdf_load_html_response)
NL (1) NL7507718A (enrdf_load_html_response)
SE (1) SE7507069L (enrdf_load_html_response)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52118091U (enrdf_load_html_response) * 1976-03-03 1977-09-07
DE2819386A1 (de) * 1978-05-03 1979-11-08 Bosch Gmbh Robert Fernbedienung fuer funksprechgeraete
IT1110111B (it) * 1979-01-12 1985-12-23 Acet Srl Impianto citofonico a portiere elettrico a due fili,suscettibile di utilizzare un pressistente impianto a campanello,senza necessita' di ulteriori linee di alimentazione
DE2946177C2 (de) * 1979-11-15 1988-08-18 S. Siedle & Söhne Telefon- und Telegrafenwerke GmbH, 7743 Furtwangen Hausanlage zur Übertragung von Informationen
JPS56109065A (en) * 1980-02-01 1981-08-29 Fujitsu Ltd Selective callout system by push button telephone set
JPS5745768A (en) * 1980-08-30 1982-03-15 Matsushita Electric Works Ltd Emergency telephone device
DE3320397A1 (de) * 1983-06-06 1984-12-06 Siemens AG, 1000 Berlin und 8000 München Anordnung zur vermittelbaren uebertragung von tonsignalen
JPH0620210B2 (ja) * 1985-01-30 1994-03-16 アイホン株式会社 インターホン電話機混成装置
JPS61128860U (enrdf_load_html_response) * 1985-01-31 1986-08-12
JPS6276851A (ja) * 1985-09-30 1987-04-08 Hitachi Elevator Eng & Serv Co Ltd 多局インタ−ホンの選局装置

Also Published As

Publication number Publication date
FR2276755A1 (fr) 1976-01-23
DE2528854A1 (de) 1976-01-08
JPS5125003A (enrdf_load_html_response) 1976-03-01
SE7507069L (sv) 1975-12-29
DK291475A (da) 1975-12-28
IT1029547B (it) 1979-03-20
NL7507718A (nl) 1975-12-30
BE830487A (fr) 1975-10-16

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