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| All Patents in class 403/93 | |||||
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| Number | Date | Patentee | Title | Type | |
| 250,992 | Dec. 13, 1881 | S.I. Snyder | Chuck for watch-makers | watchmaker | |
| 354,865 | Dec. 21, 1886 | W.H. Jones | Pocket Rule | folding rules | |
| 378,894 | Mar. 06, 1888 | J. McLean | Pocket-Rule | folding rule joints | |
| 405,464 | Jun. 18, 1889 | W. Cook | Scale Measure | folding rule joints | |
| 986,772 | Mar. 14, 1911 | R.J. Simpson | Folding Steel Rule | folding rule joints | |
| 2,310,759 | Feb. 09, 1943 | I.C. Clawson | Drill with Adjustable Head | eggbeater drills | |