| Patents Granted on 1921-09-20 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 1,391,016 | Sep. 20, 1921 | H.R. Slider, W.T. Slider | Micrometer | micrometers |
| 1,391,034 | Sep. 20, 1921 | A. Williams | Drill-holder | drill sharpening machines |
| 1,391,039 | Sep. 20, 1921 | C.H. Beach | Electric Grinder | |
| 1,391,177 | Sep. 20, 1921 | G.H. Du Sell | Chuck | |
| 1,391,179 | Sep. 20, 1921 | G.E. Hemphill, E.J. Evans | Monkey Wrench | quick adjust wrenches |
| 1,391,180 | Sep. 20, 1921 | G.E. Hemphill, E.J. Evans | Wrench | quick adjust wrenches |
| 1,391,242 | Sep. 20, 1921 | G.P. Butler | Process For Making Hand Tools | screwdrivers |
| 1,391,251 | Sep. 20, 1921 | M.I. Ginsburg | Slip-jaw wrench | screw adjust wrenches |
| 1,391,375 | Sep. 20, 1921 | V. Charushin, E.L. Fickett | Tool Holder | lathe tool holders and tool posts |
| 1,391,619 | Sep. 20, 1921 | L.A. Edwinson | Ratchet Wrench | ratchet wrenches |
| 1,391,621 | Sep. 20, 1921 | F.H. Fenwirth | Extension Rule | |
| 1,391,639 | Sep. 20, 1921 | V.R. Koontz | Collapsible tap | taps and dies |
