CA427449A - Systeme d'appels telephoniques - Google Patents
Systeme d'appels telephoniquesInfo
- Publication number
- CA427449A CA427449A CA427449A CA427449DA CA427449A CA 427449 A CA427449 A CA 427449A CA 427449 A CA427449 A CA 427449A CA 427449D A CA427449D A CA 427449DA CA 427449 A CA427449 A CA 427449A
- Authority
- CA
- Canada
- Prior art keywords
- telephone ringing
- ringing system
- telephone
- ringing
- 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 |
|---|---|---|---|
| CA427449T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA427449A true CA427449A (fr) | 1945-05-08 |
Family
ID=35538479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA427449A Expired CA427449A (fr) | Systeme d'appels telephoniques |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA427449A (fr) |
-
0
- CA CA427449A patent/CA427449A/fr not_active Expired
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