Invention Grant
- Patent Title: Plastic spine construction for ring binders
- Patent Title (中): 环形胶合板的塑料脊柱结构
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Application No.: US26447663Application Date: 1963-03-06
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Publication No.: US3175847APublication Date: 1965-03-30
- Inventor: WILLIAM MCKOWEN
- Applicant: MEREDITH PUBLISHING COMPANY
- Assignee: Meredith Publishing Company
- Current Assignee: Meredith Publishing Company
- Priority: US26447663 1963-03-06
- Main IPC: B42F13/00
- IPC: B42F13/00
Information query
