Invention Grant
- Patent Title: Electron discharge device
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Application No.: US20592938Application Date: 1938-05-04
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Publication No.: US2200722APublication Date: 1940-05-14
- Inventor: PIERCE JOHN R , TEAL GORDON K
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US20592938 1938-05-04
- Main IPC: H01J43/20
- IPC: H01J43/20
Information query
