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| Patents for William W. Doolittle | |||||
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| Number | Date | Patentee | Title | Type | |
| 489,224 | Jan. 03, 1893 | W.W. Doolittle | Tapping-machine | tapping machines | |
| 580,039 | Apr. 06, 1897 | W.W. Doolittle | Planing-machine | metal planers | |
| 584,495 | Jun. 15, 1897 | W.W. Doolittle | Planing-machine mechanism | metal planers | |
| 785,351 | Mar. 21, 1905 | W.W. Doolittle | Tool Holder | drilling and boring tool holders | |