BE425496A - - Google Patents
Info
- Publication number
- BE425496A BE425496A BE425496DA BE425496A BE 425496 A BE425496 A BE 425496A BE 425496D A BE425496D A BE 425496DA BE 425496 A BE425496 A BE 425496A
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
- Transmission Devices (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US508511XA | 1937-01-02 | 1937-01-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE425496A true BE425496A (xx) | 1938-01-31 |
Family
ID=21967872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE425496D BE425496A (xx) | 1937-01-02 | 1937-12-29 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE425496A (xx) |
| FR (1) | FR831509A (xx) |
| GB (1) | GB508511A (xx) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1025939B (de) * | 1955-09-19 | 1958-03-13 | Ericsson Telefon Ab L M | Waehlscheibe fuer automatische Fernsprechanlagen |
-
1937
- 1937-12-29 BE BE425496D patent/BE425496A/xx unknown
- 1937-12-30 FR FR831509D patent/FR831509A/fr not_active Expired
- 1937-12-31 GB GB36297/37A patent/GB508511A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB508511A (en) | 1939-06-30 |
| FR831509A (fr) | 1938-09-07 |