ES457209A1 - Instalacion interfonica. - Google Patents

Instalacion interfonica.

Info

Publication number: ES457209A1
Authority: ES; Spain
Prior art keywords: cit; interphonic; translation; installation; machine
Prior art date: 1977-01-27
Legal status (The legal status 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 status listed.): Expired

Application number

ES457209A

Other languages

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

FREIBOGEN ANSTALT

Original Assignee

FREIBOGEN ANSTALT

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.)

1977-01-27

Filing date

1977-03-25

Publication date

1978-02-01

1977-03-25 Application filed by FREIBOGEN ANSTALT filed Critical FREIBOGEN ANSTALT

1978-02-01 Publication of ES457209A1 publication Critical patent/ES457209A1/es

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
- H04M11/025—Door telephones

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Interconnected Communication Systems, Intercoms, And Interphones (AREA)

ES457209A 1977-01-27 1977-03-25 Instalacion interfonica. Expired ES457209A1 (es)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CH104077A CH614578A5 (en)	1977-01-27	1977-01-27	Intercom system, in particular for use as a door intercom system

Publications (1)

Publication Number	Publication Date
ES457209A1 true ES457209A1 (es)	1978-02-01

Family

ID=4201051

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
ES457209A Expired ES457209A1 (es)	1977-01-27	1977-03-25	Instalacion interfonica.

Country Status (5)

Country	Link
CH (1)	CH614578A5 (de)
DE (1)	DE2729469C2 (de)
ES (1)	ES457209A1 (de)
FR (1)	FR2379205A1 (de)
IT (1)	IT1077978B (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3665116A (en) *	1969-12-19	1972-05-23	Fasco Industries	Apartment house intercom system
BE775090A (fr) *	1970-11-10	1972-03-01	Citovox Ditta	Installation-parlophone avec portier electrique et connexions obtenues par deux cables seulement
DE2409393B2 (de) *	1974-02-27	1976-07-29	Siemens AG, 1000 Berlin und 8000 München	Schaltungsanordnung fuer eine kleine bis mittlere torfernsprechanlage ohne zentrale steuereinrichtungen mit mehreren von einer torstation erreichbaren hausstationen
US3978468A (en) *	1974-11-11	1976-08-31	Robert F. Moore	Intercom call signaling mechanism

1977
- 1977-01-27 CH CH104077A patent/CH614578A5/xx not_active IP Right Cessation
- 1977-02-24 IT IT4819577A patent/IT1077978B/it active
- 1977-03-25 ES ES457209A patent/ES457209A1/es not_active Expired
- 1977-06-30 DE DE19772729469 patent/DE2729469C2/de not_active Expired
- 1977-07-07 FR FR7720986A patent/FR2379205A1/fr active Granted

Also Published As

Publication number	Publication date
IT1077978B (it)	1985-05-08
DE2729469C2 (de)	1986-04-24
DE2729469A1 (de)	1978-08-03
CH614578A5 (en)	1979-11-30
FR2379205A1 (fr)	1978-08-25
FR2379205B1 (de)	1984-05-04

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