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Patents for Percy H. Root | |||||
Number | Date | Patentee | Title | Type | |
908,142 | Dec. 29, 1908 | P.H. Root | Lawn Mower Grinder | tool grinders | |
1,077,306 | Nov. 04, 1913 | P.H. Root | Grinding Machine | sharpeners | |
2,069,097 | Jan. 26, 1937 | P.H. Root | Knife grinder | sharpening machines |