| Patents Granted on 1928-02-28 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 1,660,335 | Feb. 28, 1928 | C.G. Johnson | Snap Thread Gage | special purpose gauges |
| 1,660,345 | Feb. 28, 1928 | H.E. Merseles | Washing machine | |
| 1,660,361 | Feb. 28, 1928 | O. Severson | Boring Head | boring heads |
| 1,660,385 | Feb. 28, 1928 | D.C. Klausmeyer | Strap Guarded Radial Dill | drill press accessories |
| 1,660,386 | Feb. 28, 1928 | D.C. Klausmeyer | Head to Arm Clamping Mechanism | metalworking machine mechanisms |
| 1,660,435 | Feb. 28, 1928 | C.C. Craley | Metal Working Machinery | drill press accessories |
| 1,660,477 | Feb. 28, 1928 | C.M. Conradson | Radial Drilling Machine | radial drill presses |
| 1,660,502 | Feb. 28, 1928 | J.E. Gleason, G.H. Bryan, E. Finsen, A.P. Slade | Method and apparatus for making gears | gear making machines |
| 1,660,579 | Feb. 28, 1928 | J. Roth | Hammer drill attachment for electric drill | handheld power tool accessories |
| 1,660,885 | Feb. 28, 1928 | J.T. Payette | Lath mill | lath making machines |
| 1,661,016 | Feb. 28, 1928 | W.J. Smith | Hydraulic Operating Means | metal shapers |
| 1,661,131 | Feb. 28, 1928 | G.B. Duffield | Expansible Collapsible Element | steam engine packing |
