Invention Grant
- Patent Title: Tuning fork in vacuum
- Patent Title (中): 调整叉在真空中
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Application No.: US69415833Application Date: 1933-10-18
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Publication No.: US2034282APublication Date: 1936-03-17
- Inventor: BUCKINGHAM WILLIAM D
- Applicant: WESTERN UNION TELEGRAPH CO
- Assignee: Western Union Telegraph Co
- Current Assignee: Western Union Telegraph Co
- Priority: US69415833 1933-10-18
- Main IPC: H03B5/30
- IPC: H03B5/30
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