Invention Grant
- Patent Title: Wave filter
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Application No.: US20153527Application Date: 1927-06-25
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Publication No.: US1781469APublication Date: 1930-11-11
- Inventor: MASON WARREN P
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US20153527 1927-06-25
- Main IPC: H03H9/50
- IPC: H03H9/50
Information query
IPC分类:
