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 (en) | 1974-06-27 | 1974-06-27 | INTERCOM SYSTEM WITH PARALLEL DEVICES ON A SINGLE TWO-WIRE LINE |
Publications (1)
Publication Number | Publication Date |
---|---|
LU72821A1 true LU72821A1 (en) | 1975-09-29 |
Family
ID=11275703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
LU72821A LU72821A1 (en) | 1974-06-27 | 1975-06-25 |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPS5125003A (en) |
BE (1) | BE830487A (en) |
DE (1) | DE2528854A1 (en) |
DK (1) | DK291475A (en) |
FR (1) | FR2276755A1 (en) |
IT (1) | IT1029547B (en) |
LU (1) | LU72821A1 (en) |
NL (1) | NL7507718A (en) |
SE (1) | SE7507069L (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52118091U (en) * | 1976-03-03 | 1977-09-07 | ||
DE2819386A1 (en) * | 1978-05-03 | 1979-11-08 | Bosch Gmbh Robert | REMOTE CONTROL FOR RADIO INTERCOMS |
IT1110111B (en) * | 1979-01-12 | 1985-12-23 | Acet Srl | TWO-WIRE ELECTRIC DOOR ENTRY SYSTEM, SUSCEPTABLE TO USE A PRESSISTING DOOR BELL SYSTEM, WITHOUT THE NEED FOR ADDITIONAL POWER LINES |
DE2946177C2 (en) * | 1979-11-15 | 1988-08-18 | S. Siedle & Söhne Telefon- und Telegrafenwerke GmbH, 7743 Furtwangen | House system for the transmission of information |
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 (en) * | 1983-06-06 | 1984-12-06 | Siemens AG, 1000 Berlin und 8000 München | ARRANGEMENT FOR THE TRANSFERABLE TRANSMISSION OF SOUND SIGNALS |
JPH0620210B2 (en) * | 1985-01-30 | 1994-03-16 | アイホン株式会社 | Intercom telephone hybrid device |
JPS61128860U (en) * | 1985-01-31 | 1986-08-12 | ||
JPS6276851A (en) * | 1985-09-30 | 1987-04-08 | Hitachi Elevator Eng & Serv Co Ltd | Channel selection device for multi-station interphone |
-
1974
- 1974-06-27 IT IT51772/74A patent/IT1029547B/en active
-
1975
- 1975-06-18 SE SE7507069A patent/SE7507069L/en unknown
- 1975-06-18 FR FR7519116A patent/FR2276755A1/en not_active Withdrawn
- 1975-06-20 BE BE157549A patent/BE830487A/en unknown
- 1975-06-25 LU LU72821A patent/LU72821A1/xx unknown
- 1975-06-26 DK DK291475A patent/DK291475A/en unknown
- 1975-06-27 NL NL7507718A patent/NL7507718A/en unknown
- 1975-06-27 DE DE19752528854 patent/DE2528854A1/en active Pending
- 1975-06-27 JP JP50080482A patent/JPS5125003A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
IT1029547B (en) | 1979-03-20 |
BE830487A (en) | 1975-10-16 |
JPS5125003A (en) | 1976-03-01 |
FR2276755A1 (en) | 1976-01-23 |
SE7507069L (en) | 1975-12-29 |
NL7507718A (en) | 1975-12-30 |
DE2528854A1 (en) | 1976-01-08 |
DK291475A (en) | 1975-12-28 |