CA443406A - Telephone signalling system - Google Patents
Telephone signalling systemInfo
- Publication number
- CA443406A CA443406A CA443406A CA443406DA CA443406A CA 443406 A CA443406 A CA 443406A CA 443406 A CA443406 A CA 443406A CA 443406D A CA443406D A CA 443406DA CA 443406 A CA443406 A CA 443406A
- Authority
- CA
- Canada
- Prior art keywords
- signalling system
- telephone signalling
- telephone
- signalling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA443406T |
Publications (1)
Publication Number | Publication Date |
---|---|
CA443406A true CA443406A (en) | 1947-08-05 |
Family
ID=35558633
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA443406A Expired CA443406A (en) | Telephone signalling system |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA443406A (en) |
-
0
- CA CA443406A patent/CA443406A/en not_active Expired
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