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| All Patents in class 74/435 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,161,070 | Nov. 23, 1915 | H.M. Neer | Valve Grinder | valve grinding tools | |
| 1,282,018 | Oct. 22, 1918 | F.O. Albertson | Valve Grinder | valve grinding tools | |
| 2,542,515 | Feb. 20, 1951 | T.F. Harvey | Intermittent movement mechanism | electric motor making | |
| 2,868,032 | Jan. 13, 1959 | C.E. Miller | Indexing Mechanism | multiple spindle lathes | |