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| All Patents in class 451/265 | |||||
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| Number | Date | Patentee | Title | Type | |
| 417,615 | Dec. 17, 1889 | A. Webster | Machine for Grinding Lathe Beds | surface grinders | |
| 1,589,593 | Jun. 22, 1926 | F.E. Gardner | Grinding machine | disk sanders | |
| 1,628,878 | May 17, 1927 | F.E. Gardner | Work carrier | disk sanders | |
| 1,649,823 | Nov. 22, 1927 | F.E. Gardner | Grinding machine | disk sanders | |
| 1,784,231 | Dec. 09, 1930 | F.E. Gardner | Grinding machine | disk sanders | |