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| All Patents of Type: slide rules | |||||
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| Number | Date | Patentee | Title | Type | |
| 651,142 | Jun. 05, 1900 | W.L. Keuffel | Slide Rule | slide rules | |
| 838,696 | Dec. 18, 1906 | W.F. Doherty | Engineer's Slide Rule | slide rules | |
| 1,088,175 | Feb. 24, 1914 | W.O. Phillips | Slide Rule | slide rules | |
| 1,150,771 | Aug. 17, 1915 | W.L. Keuffel | Slide rule runner | slide rules | |
| 1,181,672 | May 02, 1916 | W.L. Keuffel | Slide rule runner | slide rules | |
| 1,431,409 | Oct. 10, 1922 | W.L. Miller | Slide Rule | slide rules | |
| 1,934,232 | Nov. 07, 1933 | A.W. Keuffel | Slide rule | slide rules | |