| Patents for Harold W. Holmes |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| CA-277,022 | Jan. 10, 1928 | H.W. Holmes | Centreless Grinding Machine | grinding machines |
| 1,729,780 | Oct. 01, 1929 | H.W. Holmes | Centerless Grinding Machine | grinding machines |
| 1,733,090 | Oct. 22, 1929 | H.W. Holmes | Centerless Grinder | grinding machines |
| 1,733,097 | Oct. 22, 1929 | H.W. Holmes | Centerless Grinding Machine | grinding machines |
| 1,750,175 | Mar. 11, 1930 | H.W. Holmes | Truing Device | grinding machines |
| 1,837,821 | Dec. 22, 1931 | H.W. Holmes | Centerless Grinding Machine | grinding machines |
| 1,940,214 | Dec. 19, 1933 | H.W. Holmes | Truing Device | grinder dressers |
