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| All Patents in class 451/195 | |||||
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| Number | Date | Patentee | Title | Type | |
| 449,666 | Apr. 07, 1891 | J.E. Carpenter | Wood-polishing machine | sanding machines | |
| 4,198,790 | Apr. 22, 1980 | P. Gruber | Method for Finishing Spherical Rollers | profile and contour grinders | |