| Patents for William D. Roberts |
Patents 1 -
5
of 5
      |
| Number | Date | Patentee | Title | Type |
| 2,692,460 | Oct. 26, 1954 | W.D. Roberts | Grinding apparatus for the traveling belt type | metal sanding machines |
| 2,712,204 | Jul. 05, 1955 | W.D. Roberts | Grinding apparatus of the traveling belt type | metal sanding machines |
| CA-517,417 | Oct. 11, 1955 | W.D. Roberts | Grinding apparatus of the traveling belt type | metal sanding machines |
| CA-518,310 | Nov. 08, 1955 | W.D. Roberts | Grinding apparatus of the traveling belt type | metal sanding machines |
| 2,798,340 | Jul. 09, 1957 | W.D. Roberts | Apparatus for grinding internal surfaces | metal sanding machines |
