Invention Grant
- Patent Title: Telephone system
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Application No.: US41848341Application Date: 1941-11-10
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Publication No.: US2311214APublication Date: 1943-02-16
- Inventor: CROCKER THOMAS F
- Applicant: ASSOCIATED ELECTRIC LAB INC
- Assignee: Associated Electric Lab Inc
- Current Assignee: Associated Electric Lab Inc
- Priority: US41848341 1941-11-10
- Main IPC: H04Q3/00
- IPC: H04Q3/00
Information query
