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| All Patents in class 251/325 | |||||
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| Number | Date | Patentee | Title | Type | |
| 360,972 | Apr. 12, 1887 | D.C. Prescott | Steam-feed for saw-mills | band sawmills | |
| 836,778 | Nov. 27, 1906 | A.J. Patch | Pneumatic Hammer | pneumatic tools | |
| 1,111,505 | Sep. 22, 1914 | F.E. Stevenson | Regulator for Hydraulic Steam Pumps | pump regulators | |
| 1,650,686 | Nov. 29, 1927 | H.D. Binks | Spray gun | ||