| All Patents of Type: handheld grinders |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 1,241,659 | Oct. 02, 1917 | E. Ritz, Jr. | Electric portable grinder | handheld grinders |
| 1,259,132 | Mar. 12, 1918 | E. Ritz, Jr. | Portable electric tool | handheld grinders |
| 2,031,133 | Feb. 18, 1936 | R. Schümann | Electric Hand Tool | handheld grinders |
| 2,368,888 | Feb. 06, 1945 | R. Schümann | Small Electric Machine Tool | handheld grinders |
| 2,377,271 | May 29, 1945 | R. Schümann | Flexible Shaft And Air-Cooled Hand Piece | handheld power tool accessories |
| 2,452,268 | Oct. 26, 1948 | R. Schümann | Motor Hand Tool Assembly | handheld grinders |
| 2,696,569 | Dec. 07, 1954 | H.W. Schumann | Motor Tool | handheld grinders |
