BE437434A - - Google Patents
Info
- Publication number
- BE437434A BE437434A BE437434DA BE437434A BE 437434 A BE437434 A BE 437434A BE 437434D A BE437434D A BE 437434DA BE 437434 A BE437434 A BE 437434A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE220599X | 1939-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE437434A true BE437434A (en:Method) |
Family
ID=3866093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE437434D BE437434A (en:Method) | 1939-12-20 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE437434A (en:Method) |
| CH (1) | CH220599A (en:Method) |
| FR (1) | FR881760A (en:Method) |
-
0
- BE BE437434D patent/BE437434A/xx unknown
-
1941
- 1941-08-08 CH CH220599D patent/CH220599A/de unknown
-
1942
- 1942-05-04 FR FR881760D patent/FR881760A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH220599A (de) | 1942-04-15 |
| FR881760A (fr) | 1943-05-07 |