Invention Grant
- Patent Title: Loose sheet holder
- Patent Title (中): 松散的支架
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Application No.: US52308621Application Date: 1921-12-17
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Publication No.: US1968286APublication Date: 1934-07-31
- Inventor: JOSEPH EIFEL
- Applicant: JOSEPH EIFEL
- Assignee: Eifel Joseph
- Current Assignee: Eifel Joseph
- Priority: US52308621 1921-12-17
- Main IPC: B42F13/12
- IPC: B42F13/12
Information query
