BE494602A - - Google Patents
Info
- Publication number
- BE494602A BE494602A BE494602DA BE494602A BE 494602 A BE494602 A BE 494602A BE 494602D A BE494602D A BE 494602DA BE 494602 A BE494602 A BE 494602A
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Alarm Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE712176X | 1949-03-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE494602A true BE494602A (en:Method) |
Family
ID=20315759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE494602D BE494602A (en:Method) | 1949-03-19 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE494602A (en:Method) |
| DE (1) | DE874465C (en:Method) |
| FR (1) | FR1018794A (en:Method) |
| GB (2) | GB712176A (en:Method) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1018932B (de) * | 1955-08-11 | 1957-11-07 | Siemens Ag | Alarmrufeinrichtung bei Wechselsprechanlagen |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE730913C (de) * | 1941-04-30 | 1943-01-28 | Siemens Ag | Meldeanlage fuer die UEbermittlung von Meldungen verschiedener Bedeutung und fuer die Herstellung von Fernsprechverbindungen ueber Schleifenleitungen |
-
0
- BE BE494602D patent/BE494602A/xx unknown
-
1950
- 1950-03-17 FR FR1018794D patent/FR1018794A/fr not_active Expired
- 1950-03-19 DE DEC672A patent/DE874465C/de not_active Expired
- 1950-03-20 GB GB6928/50A patent/GB712176A/en not_active Expired
- 1950-03-20 GB GB28998/52A patent/GB712227A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE874465C (de) | 1953-04-23 |
| FR1018794A (fr) | 1953-01-13 |
| GB712176A (en) | 1954-07-21 |
| GB712227A (en) | 1954-07-21 |