SE378730B - - Google Patents
Info
- Publication number
- SE378730B SE378730B SE7304802A SE7304802A SE378730B SE 378730 B SE378730 B SE 378730B SE 7304802 A SE7304802 A SE 7304802A SE 7304802 A SE7304802 A SE 7304802A SE 378730 B SE378730 B SE 378730B
- Authority
- SE
- Sweden
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
- H04M1/53—Generation of additional signals, e.g. additional pulses
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7213423A FR2180444B1 (zh) | 1972-04-17 | 1972-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE378730B true SE378730B (zh) | 1975-09-08 |
Family
ID=9096973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7304802A SE378730B (zh) | 1972-04-17 | 1973-04-05 |
Country Status (3)
| Country | Link |
|---|---|
| FI (1) | FI57677C (zh) |
| FR (1) | FR2180444B1 (zh) |
| SE (1) | SE378730B (zh) |
-
1972
- 1972-04-17 FR FR7213423A patent/FR2180444B1/fr not_active Expired
-
1973
- 1973-04-05 SE SE7304802A patent/SE378730B/xx unknown
- 1973-04-10 FI FI113273A patent/FI57677C/sv active
Also Published As
| Publication number | Publication date |
|---|---|
| FI57677B (fi) | 1980-05-30 |
| FR2180444B1 (zh) | 1974-12-20 |
| FR2180444A1 (zh) | 1973-11-30 |
| FI57677C (fi) | 1980-09-10 |