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| All Patents in class 451/34 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,334,238 | Nov. 16, 1943 | W.G. Baldenhofer | Surface Grinder Spindle Bearing | metalworking machine bearings | |
| 2,749,677 | Jun. 12, 1956 | D.E. Burgess | Sharpener for Planing Machine Cutter Block Blades | sharpening machines | |