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| All Patents in class 200/34 | |||||
| Number | Date | Patentee | Title | Type | |
| 2,143,533 | Jan. 10, 1939 | C.E. Brown, W.D. Archea | Machine Tool | grinding machines | |
| 3,452,175 | Jun. 24, 1969 | D.F. Wilkes | Rolamite bearings | industrial machine bearings | |