CA309966A - Telephone exchange system - Google Patents
Telephone exchange systemInfo
- Publication number
- CA309966A CA309966A CA309966A CA309966DA CA309966A CA 309966 A CA309966 A CA 309966A CA 309966 A CA309966 A CA 309966A CA 309966D A CA309966D A CA 309966DA CA 309966 A CA309966 A CA 309966A
- Authority
- CA
- Canada
- Prior art keywords
- exchange system
- telephone exchange
- telephone
- exchange
- 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 |
---|---|---|---|
CA309966T |
Publications (1)
Publication Number | Publication Date |
---|---|
CA309966A true CA309966A (en) | 1931-03-31 |
Family
ID=35269290
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA309966A Expired CA309966A (en) | Telephone exchange system |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA309966A (en) |
-
0
- CA CA309966A patent/CA309966A/en not_active Expired
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