| Patents for none listed |
Patents 556 -
570
of 3291
      |
| Number | Date | Patentee | Title | Type |
| 1,363,343 | Dec. 28, 1920 | H.G. Norwood | Wrench | alligator wrenches |
| 1,363,587 | Dec. 28, 1920 | B.M. Hanson | Metal Working Machine | metal slotting machines |
| 1,364,937 | Jan. 11, 1921 | O.R. Kirkpatrick | Monkey Wrench | quick adjust wrenches |
| 1,365,468 | Jan. 11, 1921 | J.F. Duby | Valve Spring Lifter | valve spring tools |
| 1,365,484 | Jan. 11, 1921 | I. Greenwald | Micrometer | micrometers |
| D56,945 | Jan. 18, 1921 | P. Piotrowski | Wrench | wrenches |
| 1,366,099 | Jan. 18, 1921 | J. Reichert | Calf Weaner | animal weaners |
| 1,366,133 | Jan. 18, 1921 | J. Reichert | Calf Weaner and the Like (Jointed) | animal weaners |
| D56,979 | Jan. 25, 1921 | N. Larson | Combination Tool | combination tools |
| 1,366,413 | Jan. 25, 1921 | F.C. Olin | Tractor | tractors |
| 1,367,969 | Feb. 08, 1921 | J.C. Holley | Wrench | brace wrenches |
| D57,113 | Feb. 22, 1921 | L. Campbell, Sr. | Wrench | wrenches |
| D57,153 | Feb. 22, 1921 | L.A. Safford | Handle for Wrench or Similar Hand Tools | wrench handle components |
| D57,157 | Feb. 22, 1921 | J. Schwendner | Combination Tool | combination tools |
| 1,369,784 | Mar. 01, 1921 | G.D. Chenette | Wrench | screw adjust wrenches |
