Invention Grant
- Patent Title: Evacuating audion tube
- Patent Title (中): 撤离听管
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Application No.: US70233524Application Date: 1924-03-27
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Publication No.: US1699597APublication Date: 1929-01-22
- Inventor: ANTON LEDERER ERNEST
- Applicant: WESTINGHOUSE LAMP CO
- Assignee: Westinghouse Lamp Co
- Current Assignee: Westinghouse Lamp Co
- Priority: US70233524 1924-03-27
- Main IPC: H01J7/18
- IPC: H01J7/18
Information query
