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| Patents for Dempsey B. Hanson | |||||
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| Number | Date | Patentee | Title | Type | |
| 390,227 | Oct. 02, 1888 | D.B. Hanson | Band-saw mill | band sawmills | |
| 437,490 | Sep. 30, 1890 | D.B. Hanson | Band-saw mill | band sawmills | |
| 491,683 | Feb. 14, 1893 | W.H. Trout, D.B. Hanson, G.M. Hinkley | Bandsaw mill | band sawmills | |
| 532,663 | Jan. 15, 1895 | D.B. Hanson | Bandsaw mill | band sawmills | |
| 533,124 | Jan. 29, 1895 | D.B. Hanson | Offsetting Sawmill Carriage | sawmill carriages | |