CA385260A - Telephone signalling system - Google Patents
Telephone signalling systemInfo
- Publication number
- CA385260A CA385260A CA385260A CA385260DA CA385260A CA 385260 A CA385260 A CA 385260A CA 385260 A CA385260 A CA 385260A CA 385260D A CA385260D A CA 385260DA CA 385260 A CA385260 A CA 385260A
- 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 |
---|---|---|---|
CA385260T |
Publications (1)
Publication Number | Publication Date |
---|---|
CA385260A true CA385260A (en) | 1939-11-21 |
Family
ID=35390483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA385260A Expired CA385260A (en) | Telephone signalling system |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA385260A (en) |
-
0
- CA CA385260A patent/CA385260A/en not_active Expired
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