| Patents Granted on 1920-12-__ |
Patents 1 -
15
of 54
      |
| Number | Date | Patentee | Title | Type |
| GB-154,507 | Dec. 02, 1920 | A. Parkinson | Improvements in or relating to brush lifting and short circuiting means for induction motors | induction motors |
| FR-510,319 | Dec. 02, 1920 | W. Owen, J.H. Melloy | Improvements to Gear Cutting Machines, Slotting Machines and Other Similar Machines | gear making machines |
| 1,361,007 | Dec. 07, 1920 | N.E. Brown | Center cleaning and oiling device | industrial machine lubrication |
| 1,361,021 | Dec. 07, 1920 | L.G. Copeman | Tool Holder | tool holders |
| 1,361,130 | Dec. 07, 1920 | P. York | Wrench | wrench handle components |
| 1,361,136 | Dec. 07, 1920 | J. Burke | Construction of smaller motors | electric motors |
| 1,361,156 | Dec. 07, 1920 | F.O. Jaques, Sr. | Micrometer Calipers | micrometers |
| 1,361,198 | Dec. 07, 1920 | C.A. Strand | Tool Holder | lathe tool holders and tool posts |
| 1,361,219 | Dec. 07, 1920 | J.J. Bartenstein | Valve Spring Holder | valve spring tools |
| 1,361,335 | Dec. 07, 1920 | J.E. Kampe | Tool Holder/ Screwdriver | watchmaker |
| 1,361,363 | Dec. 07, 1920 | J. Burke | Compensation windings | electric motors |
| 1,361,406 | Dec. 07, 1920 | J.V. Romig | Combined Micrometer Caliper | micrometers |
| 1,361,433 | Dec. 07, 1920 | R. Allen | Carpenter's plane | plane cap irons |
| 1,361,686 | Dec. 07, 1920 | M.C. Conwell | Tool | boring heads |
| 1,361,792 | Dec. 07, 1920 | W.F. Groene | Tailstock | metal lathes |
