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Patents for Frank H. Bierman | |||||
Number | Date | Patentee | Title | Type | |
1,138,996 | May 11, 1915 | G.T. Strite, F.H. Bierman | Traction-engine | tractors | |
1,194,569 | Aug. 15, 1916 | G.T. Strite, F.H. Bierman | Drive-gearing for traction-engines | motor vehicle gearing | |
1,444,100 | Feb. 06, 1923 | F.H. Bierman | Lawn-mower-sharpening machine | sharpening machines | |
1,662,598 | Mar. 13, 1928 | F.H. Bierman | Clutch and clutch-actuating mechanism | clutches | |
1,866,794 | Jul. 12, 1932 | F.H. Bierman | Lawn mower sharpening machine | sharpening machines |