Invention Grant
- Patent Title: Time control device
- Patent Title (中): 时间控制装置
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Application No.: US74204434Application Date: 1934-08-30
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Publication No.: US2115280APublication Date: 1938-04-26
- Inventor: DAVID PERLMAN
- Applicant: DAVID PERLMAN
- Assignee: Perlman David
- Current Assignee: Perlman David
- Priority: US74204434 1934-08-30
- Main IPC: G04F3/08
- IPC: G04F3/08
Information query
