CA447428A - Amplificateur mecanique pour systemes telephoniques - Google Patents
Amplificateur mecanique pour systemes telephoniquesInfo
- Publication number
- CA447428A CA447428A CA447428A CA447428DA CA447428A CA 447428 A CA447428 A CA 447428A CA 447428 A CA447428 A CA 447428A CA 447428D A CA447428D A CA 447428DA CA 447428 A CA447428 A CA 447428A
- Authority
- CA
- Canada
- Prior art keywords
- telephone systems
- mechanical amplifier
- amplifier
- mechanical
- telephone
- 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 |
|---|---|---|---|
| CA447428T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA447428A true CA447428A (fr) | 1948-03-23 |
Family
ID=35565109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA447428A Expired CA447428A (fr) | Amplificateur mecanique pour systemes telephoniques |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA447428A (fr) |
-
0
- CA CA447428A patent/CA447428A/fr not_active Expired
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