BE472654A - - Google Patents
Info
- Publication number
- BE472654A BE472654A BE472654DA BE472654A BE 472654 A BE472654 A BE 472654A BE 472654D A BE472654D A BE 472654DA BE 472654 A BE472654 A BE 472654A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/16—Security signalling or alarm systems, e.g. redundant systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Alarm Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2598645A GB601849A (en) | 1945-10-05 | 1945-10-05 | Improvements in or relating to telephone systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE472654A true BE472654A (en:Method) |
Family
ID=10236504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE472654D BE472654A (en:Method) | 1945-10-05 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE472654A (en:Method) |
| FR (1) | FR956790A (en:Method) |
| GB (1) | GB601849A (en:Method) |
-
0
- BE BE472654D patent/BE472654A/xx unknown
- FR FR956790D patent/FR956790A/fr not_active Expired
-
1945
- 1945-10-05 GB GB2598645A patent/GB601849A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB601849A (en) | 1948-05-13 |
| FR956790A (en:Method) | 1950-02-07 |