Invention Grant
- Patent Title: Collapsible shutter for projectors
- Patent Title (中): 投影机折叠快门
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Application No.: US23656527Application Date: 1927-11-29
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Publication No.: US1837776APublication Date: 1931-12-22
- Inventor: FRANCIS JENKINS CHARLES
- Applicant: JENKINS LAB
- Assignee: Jenkins Lab
- Current Assignee: Jenkins Lab
- Priority: US23656527 1927-11-29
- Main IPC: G03B9/10
- IPC: G03B9/10
Information query
