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| Patents for William C. Keyes | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 3,364,626 | Jan. 23, 1968 | W.C. Keyes | Belt sanding and polishing machines | |
![]() | 3,400,493 | Sep. 10, 1968 | W.C. Keyes | Belt sanding and polishing machine | |