| Patents Granted on 1928-03-20 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 1,662,821 | Mar. 20, 1928 | S. Einstein | Internal Grinder | grinding machines |
| 1,662,936 | Mar. 20, 1928 | R. Phillipp | Chamfering Device | pipe deburring tools |
| 1,662,959 | Mar. 20, 1928 | K.H. Crumrine | Tool Post | lathe tool holders and tool posts |
| 1,663,018 | Mar. 20, 1928 | C.D. McDonald | Automatic die press | |
| 1,663,019 | Mar. 20, 1928 | C.D. McDonald | Automatic die-press-stopping mechanism | |
| 1,663,020 | Mar. 20, 1928 | C.D. McDonald | Automatic press-stopping mechanism | |
| 1,663,217 | Mar. 20, 1928 | E.J. Ryan | Camber and Depth Gauge | measurement gauges |
| 1,663,241 | Mar. 20, 1928 | E. Cheshire | Saw blade | sawblades |
| 1,663,267 | Mar. 20, 1928 | V.V. Colby | Means for cutting | scrollsaws |
| 1,663,293 | Mar. 20, 1928 | A.B. Cook | Measuring Ruler | rule graduations |
| 1,663,313 | Mar. 20, 1928 | J.W. Motherwell | Adjusting Mechanism for Pressure Gauges | vacuum and pressure gauges |
| 1,663,493 | Mar. 20, 1928 | H.C. Clay | Control for Variable Speed Mechanism | industrial machine speed and direction changing mechanisms |
| 1,663,535 | Mar. 20, 1928 | H.L. Brandau | Automatic core cutter and laying-up machine | circular saws |
