| Patents for none listed |
Patents 586 -
600
of 3291
      |
| Number | Date | Patentee | Title | Type |
| 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 |
| 1,386,708 | Aug. 09, 1921 | J.C. Hurley | Wrench | ratchet wrenches |
| 1,387,040 | Aug. 09, 1921 | F.C. Brandenburg | Tool for Dressing Emery Wheels | grinder dressers |
| 1,388,034 | Aug. 16, 1921 | G. Gillespie | Extension Micrometer | micrometers |
| 1,389,584 | Sep. 06, 1921 | G.W. Goodridge | Splicing Tool | pliers |
| 1,390,371 | Sep. 13, 1921 | C. Meyer | Wrench | automotive specialty wrenches |
