BE427523A - - Google Patents
Info
- Publication number
- BE427523A BE427523A BE427523DA BE427523A BE 427523 A BE427523 A BE 427523A BE 427523D A BE427523D A BE 427523DA BE 427523 A BE427523 A BE 427523A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/001—Two-way communication systems between a limited number of parties
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Emergency Alarm Devices (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR49397T | 1938-04-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE427523A true BE427523A (da) |
Family
ID=8684581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE427523D BE427523A (da) | 1938-04-07 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE427523A (da) |
| FR (2) | FR831632A (da) |
| GB (1) | GB507697A (da) |
-
0
- BE BE427523D patent/BE427523A/xx unknown
-
1937
- 1937-04-13 FR FR831632D patent/FR831632A/fr not_active Expired
-
1938
- 1938-04-07 FR FR49397D patent/FR49397E/fr not_active Expired
- 1938-04-13 GB GB11413/38A patent/GB507697A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR49397E (fr) | 1939-03-24 |
| GB507697A (en) | 1939-06-20 |
| FR831632A (fr) | 1938-09-09 |