Invention Grant
- Patent Title: Electron discharge device
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Application No.: US28372139Application Date: 1939-07-11
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Publication No.: US2227093APublication Date: 1940-12-31
- Inventor: LAICO JOSEPH P
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US28372139 1939-07-11
- Main IPC: H01J19/02
- IPC: H01J19/02 ; H01J19/40
Information query
