Invention Grant
- Patent Title: Microphone
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Application No.: US72820234Application Date: 1934-05-31
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Publication No.: US2113219APublication Date: 1938-04-05
- Inventor: OLSON HARRY F , FRANK MASSA
- Applicant: RCA CORP
- Assignee: Eutectic Corp
- Current Assignee: Eutectic Corp
- Priority: US72820234 1934-05-31
- Main IPC: H04R9/08
- IPC: H04R9/08
Information query
