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| Patents Granted on 1921-05-03 | |||||
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| Number | Date | Patentee | Title | Type | |
| RE15,098 | May 03, 1921 | A. Cash | Block-leveler | cobbler | |
| D57,768 | May 03, 1921 | A. Chadwick | Wrench | wrenches | |
| D57,775 | May 03, 1921 | D.F. Graham | Socket Wrench | socket wrenches | |
| 1,376,438 | May 03, 1921 | W.B. Huther | Inserted-tooth cutter-head and method of making the same | cutterheads | |
| 1,376,507 | May 03, 1921 | P.L. Billingsley | Automobile jack | vehicle mechanic | |
| 1,376,583 | May 03, 1921 | H.G. Rice | Bottle Capper | bottle cappers | |
| 1,376,651 | May 03, 1921 | E. Smith | Drawknife | draw knives | |
| 1,376,687 | May 03, 1921 | A.F. Froussard | Elevator Locking Device | elevators and lifts | |
| 1,376,708 | May 03, 1921 | F.J. Lapointe | Broaching-machine | broaching machines | |
| 1,376,709 | May 03, 1921 | F.J. Lapointe | Spline-finishing broach | broaches | |
| 1,376,721 | May 03, 1921 | C.F. Mueller | Screw Wrench | screw adjust wrenches | |
| 1,376,765 | May 03, 1921 | L.S. Harvey | Ball-and-socket fastener | ||
| 1,376,791 | May 03, 1921 | F.W. Franklin, W.W. Baker | Self Centering Tool Holder | metalworking machine tool holders | |
| 1,376,861 | May 03, 1921 | F.M. Davis | Universal duplex milling-machine | milling machines | |
| 1,376,883 | May 03, 1921 | L.E. Hunt | Engine Indicator | steam engine indicators | |