Invention Grant
- Patent Title: Carbon sheet support for writing machines
- Patent Title (中): 写字机碳片支架
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Application No.: US1203035Application Date: 1935-03-20
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Publication No.: US2089982APublication Date: 1937-08-17
- Inventor: PRINGLE WILLIAM A
- Applicant: AMERICAN SALES BOOK CO INC
- Assignee: American Sales Book Co Inc
- Current Assignee: American Sales Book Co Inc
- Priority: US1203035 1935-03-20
- Main IPC: B41L5/10
- IPC: B41L5/10
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