CH567850A5 - - Google Patents
Info
- Publication number
- CH567850A5 CH567850A5 CH9473A CH9473A CH567850A5 CH 567850 A5 CH567850 A5 CH 567850A5 CH 9473 A CH9473 A CH 9473A CH 9473 A CH9473 A CH 9473A CH 567850 A5 CH567850 A5 CH 567850A5
- Authority
- CH
- Switzerland
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7200274A FR2166729A5 (xx) | 1972-01-06 | 1972-01-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH567850A5 true CH567850A5 (xx) | 1975-10-15 |
Family
ID=9091529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH9473A CH567850A5 (xx) | 1972-01-06 | 1973-01-05 |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH567850A5 (xx) |
| ES (1) | ES410366A1 (xx) |
| FR (1) | FR2166729A5 (xx) |
-
1972
- 1972-01-06 FR FR7200274A patent/FR2166729A5/fr not_active Expired
-
1973
- 1973-01-05 CH CH9473A patent/CH567850A5/xx not_active IP Right Cessation
- 1973-01-05 ES ES410366A patent/ES410366A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES410366A1 (es) | 1975-12-01 |
| FR2166729A5 (xx) | 1973-08-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |