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| All Patents in class 451/34 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,334,238 | Nov. 16, 1943 | W.G. Baldenhofer | Surface Grinder Spindle Bearing | ||
 | 2,749,677 | Jun. 12, 1956 | D.E. Burgess | Sharpener for Planing Machine Cutter Block Blades | |
 | 2,932,205 | Apr. 12, 1960 | T.B. Keesling | Power operated tool attachment for electric drills and the like | |