Invention Grant
- Patent Title: Loose-leaf file
- Patent Title (中): 松叶文件
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Application No.: US27169119Application Date: 1919-01-17
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Publication No.: US1333350APublication Date: 1920-03-09
- Inventor: STRAUSS GUSTAVUS E
- Applicant: STRAUSS GUSTAVUS E
- Assignee: Gustavus E Strauss
- Current Assignee: Gustavus E Strauss
- Priority: US27169119 1919-01-17
- Main IPC: B42F15/00
- IPC: B42F15/00
Information query
