BE431789A - - Google Patents
Info
- Publication number
- BE431789A BE431789A BE431789DA BE431789A BE 431789 A BE431789 A BE 431789A BE 431789D A BE431789D A BE 431789DA BE 431789 A BE431789 A BE 431789A
- 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)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US214505XA | 1937-12-24 | 1937-12-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE431789A true BE431789A (en:Method) | 1939-01-31 |
Family
ID=21804297
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE439754D BE439754A (en:Method) | 1937-12-24 | ||
| BE431789D BE431789A (en:Method) | 1937-12-24 | 1938-12-22 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE439754D BE439754A (en:Method) | 1937-12-24 |
Country Status (5)
| Country | Link |
|---|---|
| BE (2) | BE431789A (en:Method) |
| CH (2) | CH214505A (en:Method) |
| DE (1) | DE888868C (en:Method) |
| FR (2) | FR847962A (en:Method) |
| GB (1) | GB511119A (en:Method) |
-
0
- BE BE439754D patent/BE439754A/xx unknown
-
1938
- 1938-12-09 GB GB35970/38A patent/GB511119A/en not_active Expired
- 1938-12-17 DE DEI3204D patent/DE888868C/de not_active Expired
- 1938-12-21 CH CH214505D patent/CH214505A/de unknown
- 1938-12-22 BE BE431789D patent/BE431789A/xx unknown
- 1938-12-23 FR FR847962D patent/FR847962A/fr not_active Expired
-
1941
- 1941-11-13 FR FR878171D patent/FR878171A/fr not_active Expired
- 1941-11-13 CH CH236356D patent/CH236356A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE439754A (en:Method) | |
| CH214505A (de) | 1941-04-30 |
| FR878171A (fr) | 1943-01-13 |
| CH236356A (de) | 1945-01-31 |
| DE888868C (de) | 1953-09-07 |
| FR847962A (fr) | 1939-10-19 |
| GB511119A (en) | 1939-08-14 |