| Patents for Robert E. W. Harrison |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| 1,840,231 | Jan. 05, 1932 | F.S. Haas, R.E. Harrison | Grinding Machine | grinding machines |
| 1,952,130 | Mar. 27, 1934 | F.S. Haas, R.E. Harrison | Brake Shoe Grinder | grinding machines |
| 1,972,623 | Sep. 04, 1934 | R.E. Harrison | Grinding Machine | grinding machines |
| 1,980,682 | Nov. 13, 1934 | R.E. Harrison | Grinding Machine | grinding machines |
| 1,993,822 | Mar. 12, 1935 | R.E. Harrison, G.W. Binns, S.E. Bergstrum, F.S. Haas | Grinding Machine | grinding machines |
| 2,010,361 | Aug. 06, 1935 | R.E. Harrison | Grinding Machine | grinding machines |
| 2,020,548 | Nov. 12, 1935 | R.E. Harrison | Testing Apparatus for Surface Finish | grinding machines |
| 2,042,257 | May 26, 1936 | C.W. Hopkins, R.E. Harrison | Machine Tool | grinding machines |
| 2,049,611 | Aug. 04, 1936 | C.W. Hopkins, R.E. Harrison | Automatic Sizing Mechanism | grinding machines |
