IT992740B - Citofono per impianti telefonici per porta e apri porta - Google Patents
Citofono per impianti telefonici per porta e apri portaInfo
- 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
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)
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)
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. |
-
1972
- 1972-08-04 DE DE19722238325 patent/DE2238325B2/de not_active Withdrawn
-
1973
- 1973-07-27 IT IT2722073A patent/IT992740B/it active
- 1973-08-02 BE BE134183A patent/BE803154A/xx unknown
- 1973-08-03 FR FR7328514A patent/FR2195129B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2238325A1 (de) | 1974-08-22 |
BE803154A (fr) | 1973-12-03 |
DE2238325B2 (de) | 1974-12-05 |
FR2195129B1 (it) | 1976-06-18 |
FR2195129A1 (it) | 1974-03-01 |
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