Invention Grant
- Patent Title: Telephone hook-switch.
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Application No.: US1904218301Application Date: 1904-07-26
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Publication No.: US839830APublication Date: 1907-01-01
- Inventor: FOSTER GEORGE D
- Applicant: AMERICAN ELECTRIC TELEPHONE COMPANY
- Assignee: American Electric Telephone Company
- Current Assignee: American Electric Telephone Company
- Priority: US1904218301 1904-07-26
Information query
