Invention Grant
- Patent Title: Construction for blackboards and the like
- Patent Title (中): 黑板建筑等
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Application No.: US43793865Application Date: 1965-03-08
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Publication No.: US3363341APublication Date: 1968-01-16
- Inventor: GLASSMAN FREDERICK R
- Applicant: FREDERICK R. GLASSMAN
- Assignee: Frederick R. Glassman
- Current Assignee: Frederick R. Glassman
- Priority: US43793865 1965-03-08
- Main IPC: B43L1/06
- IPC: B43L1/06
Information query
