| Patents for none listed |
Patents 571 -
585
of 3200
      |
| Number | Date | Patentee | Title | Type |
| 1,375,530 | Apr. 19, 1921 | C.G. Moline | Wrench | screw adjust wrenches |
| 1,375,747 | Apr. 26, 1921 | M. Zigray | Rivet Gage | special purpose gauges |
| 1,376,583 | May 03, 1921 | H.G. Rice | Bottle Capper | bottle cappers |
| 1,378,209 | May 17, 1921 | J.E. Bergman | Wrench | nut wrenches |
| D57,987 | May 24, 1921 | C.W. Manzel | Grease Gun | grease guns |
| 1,380,566 | Jun. 07, 1921 | A.W. Kiefer | Pipe Wrench | pipe wrenches |
| 1,381,457 | Jun. 14, 1921 | M.H. Derringer | Tool Holder | lathe tool holders and tool posts |
| 1,382,320 | Jun. 21, 1921 | C. Yunker, E. Riley | Bolt and Nut Holder | socket wrenches |
| 1,382,611 | Jun. 28, 1921 | B.F. Augustine | Rotary Gas Engine | rotary engines |
| 1,382,794 | Jun. 28, 1921 | M.L. Luebben | Machine for Sharpening Safety Razor Blades | household tools |
| RE15,162 | Jul. 26, 1921 | C.J. Bousfield | Device For Removing Puppet Valves | valve spring tools |
| D58,467 | Jul. 26, 1921 | F.S. Durham | Pliers | pliers |
| 1,385,491 | Jul. 26, 1921 | G.G. Porter | Back-facing attachment for lathes | metal lathe accessories and attachments |
| 1,385,516 | Jul. 26, 1921 | W.A. Bernard | Hand Tool | pliers |
| 1,385,994 | Aug. 02, 1921 | A.B. Heimbach | Quickly Adjustable Wrench | quick adjust wrenches |
