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| All Patents in class 451/267 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 156,474 | Nov. 03, 1874 | J.H. Weaver, J.P. Beck | Improvement in machines for smoothing and cornering panels | |
 | 191,640 | Jun. 05, 1877 | J.P. Beck | Improvement in sandpapering-machines | |
 | 813,167 | Feb. 20, 1906 | L.H. Olmsted | Grinding apparatus | |
| 1,416,952 | May 23, 1922 | R.D. Gardner | Ring-grinding machine | ||
| 1,465,762 | Aug. 21, 1923 | R.D. Gardner | Double-spindle disk grinder | ||