IT1237050B - Sistema interfonico televisivo a due fili. - Google Patents

Sistema interfonico televisivo a due fili.

Info

Publication number
IT1237050B
IT1237050B IT04857489A IT4857489A IT1237050B IT 1237050 B IT1237050 B IT 1237050B IT 04857489 A IT04857489 A IT 04857489A IT 4857489 A IT4857489 A IT 4857489A IT 1237050 B IT1237050 B IT 1237050B
Authority
IT
Italy
Prior art keywords
wire telephone
interphone system
telephone interphone
wire
telephone
Prior art date
Application number
IT04857489A
Other languages
English (en)
Other versions
IT8948574A1 (it
IT8948574A0 (it
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Publication of IT8948574A0 publication Critical patent/IT8948574A0/it
Publication of IT8948574A1 publication Critical patent/IT8948574A1/it
Application granted granted Critical
Publication of IT1237050B publication Critical patent/IT1237050B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
    • H04N7/186—Video door telephones
    • 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)
  • Multimedia (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
IT04857489A 1988-11-19 1989-11-17 Sistema interfonico televisivo a due fili. IT1237050B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63293347A JP2863855B2 (ja) 1988-11-19 1988-11-19 テレビインターホンシステム

Publications (3)

Publication Number Publication Date
IT8948574A0 IT8948574A0 (it) 1989-11-17
IT8948574A1 IT8948574A1 (it) 1991-05-17
IT1237050B true IT1237050B (it) 1993-05-13

Family

ID=17793622

Family Applications (1)

Application Number Title Priority Date Filing Date
IT04857489A IT1237050B (it) 1988-11-19 1989-11-17 Sistema interfonico televisivo a due fili.

Country Status (2)

Country Link
JP (1) JP2863855B2 (it)
IT (1) IT1237050B (it)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58171184A (ja) * 1982-03-31 1983-10-07 Matsushita Electric Works Ltd モニタテレビ付インタ−ホン装置
JPS60106281A (ja) * 1983-11-15 1985-06-11 Matsushita Electric Ind Co Ltd テレビ付インタ−ホン装置

Also Published As

Publication number Publication date
IT8948574A1 (it) 1991-05-17
IT8948574A0 (it) 1989-11-17
JPH02140048A (ja) 1990-05-29
JP2863855B2 (ja) 1999-03-03

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19951128