| All Patents in class 310/83 |
Patents 16 -
30
of 37
      |
| Number | Date | Patentee | Title | Type |
| 1,372,045 | Mar. 22, 1921 | R.G. Sedgewick | Valve grinder | handheld power tools |
| 1,411,538 | Apr. 04, 1922 | A.H. Sweetland | Hand drill | handheld power drills |
| 1,445,294 | Feb. 13, 1923 | H.P. Camp | Electric hand drill | handheld power drills |
| 1,475,153 | Nov. 20, 1923 | H. Athenas | Portable electric combination drill | handheld power drills |
| 1,497,067 | Jun. 10, 1924 | W.P. Casey | Electric handsaw | circular saws |
| 1,497,513 | Jun. 10, 1924 | G.L. Kelley | Machine for operating on floors or other surfaces | |
| 1,525,691 | Feb. 10, 1925 | G.H. Poth | Electric motor | handheld power tools |
| 1,581,927 | Apr. 20, 1926 | G.L. Kollock | Two-speed gearing for electric drill | handheld power drills |
| 1,650,911 | Nov. 29, 1927 | F. Schneider | Portable hand tool | |
| 1,651,995 | Dec. 06, 1927 | W.P. Casey | Electric hand saw | handheld circular saws |
| 1,782,927 | Nov. 25, 1930 | J.S. Knowlson | Electric power device | handheld power rotary tools |
| 1,784,133 | Dec. 09, 1930 | A.G. Decker | Electric drive for grinder wheels | |
| 1,785,798 | Dec. 23, 1930 | T.C. Weiss | Motor driven tool | handheld power drills |
| 1,828,903 | Oct. 27, 1931 | W. Moretti | Electric tool | handheld power drills |
| 2,546,846 | Mar. 27, 1951 | K.C. Atkin | Motor-driven tool | handheld power sanders |
