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| Patents for Elbert O. Hull | |||||
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| Number | Date | Patentee | Title | Type | |
| 890,210 | Jun. 09, 1908 | E.P. Bullard, Jr. | Friction-Clutch | metalworking machine clutches | |
| 1,383,630 | Jul. 05, 1921 | F.O. Hoagland | Combined Tool Holder and Cutter | lathe tool holders and tool posts | |