NL61918C - - Google Patents
Info
- Publication number
- NL61918C NL61918C NL61918DA NL61918C NL 61918 C NL61918 C NL 61918C NL 61918D A NL61918D A NL 61918DA NL 61918 C NL61918 C NL 61918C
- Authority
- NL
- Netherlands
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)
- Fire Alarms (AREA)
- Electromechanical Clocks (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB206325X | 1937-02-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL61918C true NL61918C (xx) |
Family
ID=10149136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL61918D NL61918C (xx) | 1937-02-15 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2191971A (xx) |
| BE (1) | BE426001A (xx) |
| CH (1) | CH206325A (xx) |
| FR (1) | FR832629A (xx) |
| GB (1) | GB492161A (xx) |
| NL (1) | NL61918C (xx) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB589160A (en) * | 1945-03-15 | 1947-06-12 | Alfred Samuel Horace Picking | Improvements in or relating to automatic alarm systems |
| FR956829A (xx) * | 1946-09-03 | 1950-02-08 | ||
| US2555714A (en) * | 1950-01-24 | 1951-06-05 | H S Brimm | Alarm system |
| US2804501A (en) * | 1955-09-26 | 1957-08-27 | Boeing Co | Voice warning systems |
-
0
- NL NL61918D patent/NL61918C/xx active
- BE BE426001D patent/BE426001A/xx unknown
-
1937
- 1937-02-15 GB GB4442/37A patent/GB492161A/en not_active Expired
-
1938
- 1938-01-25 FR FR832629D patent/FR832629A/fr not_active Expired
- 1938-01-26 CH CH206325D patent/CH206325A/de unknown
- 1938-01-31 US US187960A patent/US2191971A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR832629A (fr) | 1938-09-29 |
| GB492161A (en) | 1938-09-15 |
| BE426001A (xx) | |
| CH206325A (de) | 1939-07-31 |
| US2191971A (en) | 1940-02-27 |