BE424391A - - Google Patents
Info
- Publication number
- BE424391A BE424391A BE424391DA BE424391A BE 424391 A BE424391 A BE 424391A BE 424391D A BE424391D A BE 424391DA BE 424391 A BE424391 A BE 424391A
- 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
- H04M11/045—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems using recorded signals, e.g. speech
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Burglar Alarm Systems (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB30013/36A GB484307A (en) | 1936-11-04 | 1936-11-04 | Improvements in automatic burglar and fire alarms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE424391A true BE424391A (en:Method) |
Family
ID=10300856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE424391D BE424391A (en:Method) | 1936-11-04 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2161526A (en:Method) |
| BE (1) | BE424391A (en:Method) |
| FR (1) | FR828568A (en:Method) |
| GB (1) | GB484307A (en:Method) |
-
0
- BE BE424391D patent/BE424391A/xx unknown
-
1936
- 1936-11-04 GB GB30013/36A patent/GB484307A/en not_active Expired
-
1937
- 1937-10-30 FR FR828568D patent/FR828568A/fr not_active Expired
- 1937-11-02 US US172462A patent/US2161526A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR828568A (fr) | 1938-05-20 |
| GB484307A (en) | 1938-05-04 |
| US2161526A (en) | 1939-06-06 |