Invention Grant
- Patent Title: Graphical calculator
- Patent Title (中): 图形计算器
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Application No.: US5190348Application Date: 1948-09-30
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Publication No.: US2567882APublication Date: 1951-09-11
- Inventor: GOYAN FRANK M , JEAN DUFRENOY
- Applicant: GOYAN FRANK M , JEAN DUFRENOY
- Assignee: Frank M Goyan,Dufrenoy Jean
- Current Assignee: Frank M Goyan,Dufrenoy Jean
- Priority: US5190348 1948-09-30
- Main IPC: G06G1/00
- IPC: G06G1/00
Information query
