| Patents Granted on 1921-03-15 |
Patents 1 -
14
of 14
      |
| Number | Date | Patentee | Title | Type |
| D57,323 | Mar. 15, 1921 | C.C. Evans | Wrench | automotive specialty wrenches |
| D57,334 | Mar. 15, 1921 | H. Hanford | Design for a Meat Pounder and Bone Cutter | hammers |
| D57,394 | Mar. 15, 1921 | C.E. Swihart | Combination Tool | pliers |
| 1,371,350 | Mar. 15, 1921 | S.A. Campbell | Wrench | socket wrenches |
| 1,371,491 | Mar. 15, 1921 | D.C. Kerr | Wrench | wrench jaw components |
| 1,371,515 | Mar. 15, 1921 | A.C. Nielsen | Cutting Tool Holder | slotting machine tool holders |
| 1,371,617 | Mar. 15, 1921 | H. Germanow | Combination-Vise | toolmakers vises |
| 1,371,679 | Mar. 15, 1921 | J.L. Happy | Speed Wrench | self-adjust wrenches |
| 1,371,750 | Mar. 15, 1921 | W.R. Fox | Flexible shaft-coupling | |
| 1,371,799 | Mar. 15, 1921 | R. Mamers | Tool Holder | lathe tool holders and tool posts |
| 1,371,952 | Mar. 15, 1921 | P.J. Tumulla | Wrench | pipe and nut combination wrenches |
| 1,371,965 | Mar. 15, 1921 | P. York | Port Plug Wrench | automotive specialty wrenches |
| 1,371,968 | Mar. 15, 1921 | F.H. Clement | Feeding chain | woodworking machine stockfeeding mechanisms |
| 1,371,972 | Mar. 15, 1921 | E.B. Jacobson | Ignition Timer | ignition systems |
