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| All Patents in class 451/37 | |||||
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| Number | Date | Patentee | Title | Type | |
| 744,340 | Nov. 17, 1903 | J.N. Heald | Grinding Attachment for Lathes | metal lathe accessories and attachments | |
| 1,989,792 | Feb. 05, 1935 | J.C. Drader | Automatic Machine Tool | tool grinders | |
| 2,142,285 | Jan. 03, 1939 | H. Pelphrey | Hob and Method of Manufacture | gear cutting tools | |
| 2,328,869 | Sep. 07, 1943 | L.A. Wilkie | Saw band and method of lubricating the same | ||