Invention Grant
- Patent Title: Amplifier circuits
- Patent Title (中): 放大器电路
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Application No.: US32368940Application Date: 1940-03-13
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Publication No.: US2275136APublication Date: 1942-03-03
- Inventor: FERRELL ENOCH B
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US32368940 1940-03-13; US15769337 1937-08-06
- Main IPC: G05F1/52
- IPC: G05F1/52 ; H03F1/36 ; H03F3/40
Information query
IPC分类:
