BE443424A - - Google Patents
Info
- Publication number
- BE443424A BE443424A BE443424DA BE443424A BE 443424 A BE443424 A BE 443424A BE 443424D A BE443424D A BE 443424DA BE 443424 A BE443424 A BE 443424A
- 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)
- Alarm Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE221467X | 1940-12-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE443424A true BE443424A (en:Method) |
Family
ID=5840168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE443424D BE443424A (en:Method) | 1940-12-03 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE443424A (en:Method) |
| CH (1) | CH221467A (en:Method) |
-
0
- BE BE443424D patent/BE443424A/xx unknown
-
1941
- 1941-10-17 CH CH221467D patent/CH221467A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH221467A (de) | 1942-05-31 |