IT992740B - Citofono per impianti telefonici per porta e apri porta - Google Patents

Citofono per impianti telefonici per porta e apri porta

Info

Publication number
IT992740B
IT992740B IT2722073A IT2722073A IT992740B IT 992740 B IT992740 B IT 992740B IT 2722073 A IT2722073 A IT 2722073A IT 2722073 A IT2722073 A IT 2722073A IT 992740 B IT992740 B IT 992740B
Authority
IT
Italy
Prior art keywords
door
intercom
telephone systems
opener
door opener
Prior art date
Application number
IT2722073A
Other languages
English (en)
Original Assignee
Loh Kg Rittal Werk
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 by Loh Kg Rittal Werk filed Critical Loh Kg Rittal Werk
Application granted granted Critical
Publication of IT992740B publication Critical patent/IT992740B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0291—Door telephones

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
IT2722073A 1972-08-04 1973-07-27 Citofono per impianti telefonici per porta e apri porta IT992740B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722238325 DE2238325B2 (de) 1972-08-04 1972-08-04 Sprechstelle für Türsprech- und Türöffneranlagen

Publications (1)

Publication Number Publication Date
IT992740B true IT992740B (it) 1975-09-30

Family

ID=5852608

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2722073A IT992740B (it) 1972-08-04 1973-07-27 Citofono per impianti telefonici per porta e apri porta

Country Status (4)

Country Link
BE (1) BE803154A (it)
DE (1) DE2238325B2 (it)
FR (1) FR2195129B1 (it)
IT (1) IT992740B (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH701692B1 (de) * 2009-08-26 2013-09-13 Rene Koch Ag Kommunikationsvorrichtung für Festinstallation in einem Gebäude.

Also Published As

Publication number Publication date
DE2238325A1 (de) 1974-08-22
DE2238325B2 (de) 1974-12-05
BE803154A (fr) 1973-12-03
FR2195129B1 (it) 1976-06-18
FR2195129A1 (it) 1974-03-01

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