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All Patents in class 33/23.01 | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 363,657 | May 24, 1887 | J. MacKenzie | Countour Scribe for Railroad Wheels | |
2,703,455 | Mar. 08, 1955 | E.T. Green | Autoradial Engraving Device | ||
3,015,976 | Jan. 09, 1962 | C.H. Johnson | Center Drive Machine Tool |