| Patents for none listed |
Patents 556 -
570
of 3266
      |
| Number | Date | Patentee | Title | Type |
| 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 |
| D57,239 | Mar. 08, 1921 | P. Kuzmjak | Pair Of Tongs | pliers |
| D57,252 | Mar. 08, 1921 | E.W. Myers | Handle For Pliers or Similar Gripping Surfaces | pliers |
| 1,370,598 | Mar. 08, 1921 | D.H. Lapointe | Chuck | drill press chucks |
| D57,323 | Mar. 15, 1921 | C.C. Evans | Wrench | automotive specialty wrenches |
