BE394207A - - Google Patents
Info
- Publication number
- BE394207A BE394207A BE394207DA BE394207A BE 394207 A BE394207 A BE 394207A BE 394207D A BE394207D A BE 394207DA BE 394207 A BE394207 A BE 394207A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2906/33A GB414120A (en) | 1933-01-30 | 1933-01-30 | Improvements in impulse sending mechanisms for automatic telephone exchange systems and the like |
| FR749980T | 1933-02-02 | ||
| BE394207T | 1933-02-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE394207A true BE394207A (xx) | 1933-03-31 |
Family
ID=9748276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE394207D BE394207A (xx) | 1933-01-30 | 1933-02-07 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE394207A (xx) |
| FR (1) | FR749980A (xx) |
| GB (1) | GB414120A (xx) |
-
1933
- 1933-01-30 GB GB2906/33A patent/GB414120A/en not_active Expired
- 1933-02-02 FR FR749980D patent/FR749980A/fr not_active Expired
- 1933-02-07 BE BE394207D patent/BE394207A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB414120A (en) | 1934-07-30 |
| FR749980A (fr) | 1933-08-01 |