Invention Grant
- Patent Title: Process of making negatives in metal of metal surfaces
- Patent Title (中): 在金属表面制作负片的过程
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Application No.: US31657840Application Date: 1940-01-31
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Publication No.: US2258451APublication Date: 1941-10-07
- Inventor: INGHAM HERBERT S , SHEPARD ARTHUR P
- Applicant: METALLIZING ENGINEERING COMPAN
- Assignee: Metallizing Engineering Compan
- Current Assignee: Metallizing Engineering Compan
- Priority: US31657840 1940-01-31
- Main IPC: B41C3/00
- IPC: B41C3/00
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