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| All Patents of Type: hay or straw knives | |||||
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| Number | Date | Patentee | Title | Type | |
| 342,185 | May 18, 1886 | J.W. Clark, J.E. Collins | Hay Knife | hay or straw knives | |
| 626,522 | Jun. 06, 1899 | M.H. Bermes | Hay Knife | hay or straw knives | |