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| Patents for William C. Forrey | |||||
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| Number | Date | Patentee | Title | Type | |
| 247,558 | Sep. 27, 1881 | J.G. Groff | Circular-saw guard | woodworking machine safety guards | |
| 263,171 | Aug. 22, 1882 | J.G. Groff | Saw-guard | woodworking machine safety guards | |
| 264,149 | Sep. 12, 1882 | J.G. Groff | Guard for circular saws | woodworking machine safety guards | |
| 311,486 | Feb. 03, 1885 | J.G. Groff | Saw-guard | woodworking machine safety guards | |
| 323,318 | Jul. 28, 1885 | J.G. Groff | Saw-guard | woodworking machine safety guards | |