Invention Grant
- Patent Title: Protractor
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Application No.: US19363650Application Date: 1950-11-02
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Publication No.: US2594574APublication Date: 1952-04-29
- Inventor: MARSDEN GEORGE B
- Applicant: MARSDEN GEORGE B
- Assignee: George B Marsden
- Current Assignee: George B Marsden
- Priority: US19363650 1950-11-02
Information query
