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
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)
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 (https=) | 1975-09-29 |
Family
ID=11275703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU72821A LU72821A1 (https=) | 1974-06-27 | 1975-06-25 |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5125003A (https=) |
| BE (1) | BE830487A (https=) |
| DE (1) | DE2528854A1 (https=) |
| DK (1) | DK291475A (https=) |
| FR (1) | FR2276755A1 (https=) |
| IT (1) | IT1029547B (https=) |
| LU (1) | LU72821A1 (https=) |
| NL (1) | NL7507718A (https=) |
| SE (1) | SE7507069L (https=) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52118091U (https=) * | 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 (https=) * | 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 |
-
1974
- 1974-06-27 IT IT51772/74A patent/IT1029547B/it active
-
1975
- 1975-06-18 SE SE7507069A patent/SE7507069L/xx unknown
- 1975-06-18 FR FR7519116A patent/FR2276755A1/fr not_active Withdrawn
- 1975-06-20 BE BE157549A patent/BE830487A/xx unknown
- 1975-06-25 LU LU72821A patent/LU72821A1/xx unknown
- 1975-06-26 DK DK291475A patent/DK291475A/da unknown
- 1975-06-27 NL NL7507718A patent/NL7507718A/xx unknown
- 1975-06-27 DE DE19752528854 patent/DE2528854A1/de active Pending
- 1975-06-27 JP JP50080482A patent/JPS5125003A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| SE7507069L (sv) | 1975-12-29 |
| DE2528854A1 (de) | 1976-01-08 |
| DK291475A (da) | 1975-12-28 |
| BE830487A (fr) | 1975-10-16 |
| FR2276755A1 (fr) | 1976-01-23 |
| JPS5125003A (https=) | 1976-03-01 |
| NL7507718A (nl) | 1975-12-30 |
| IT1029547B (it) | 1979-03-20 |