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| All Patents in class 56/17.5 | |||||
| Number | Date | Patentee | Title | Type | |
| 2,793,485 | May 28, 1957 | J.G. Bentley, A.N. Emmons | Grass trimmer | ||
| 3,034,275 | May 15, 1962 | R. Happe, L.F. Daman | Combination unit grass edger and trimmer | ||
| 3,877,146 | Apr. 15, 1975 | C.B. Pittinger | Rotating blade holder | ||