| All Patents in class 310/83 |
Patents 1 -
15
of 37
      |
| Number | Date | Patentee | Title | Type |
| 159,028 | Jan. 26, 1875 | G.F. Green | Improvement in electro-magnetic dental tools | electrical devices |
| 595,731 | Dec. 21, 1897 | M.B. Pengnet | Electric motor | electric motors |
| 606,549 | Jun. 28, 1898 | E. Holmes | Portable electric drill | handheld power drills |
| 644,591 | Mar. 06, 1900 | W.P. Freeman | Electric drill, &c. | drill presses |
| 781,062 | Jan. 31, 1905 | D.J. Hauss, C.W. Miles | Electric or hand-powered breast drill | handheld power tools |
| 810,444 | Jan. 23, 1906 | C.W. Theil | Electric drill | handheld power tools |
| 938,709 | Nov. 02, 1909 | G.H. Rowe | Electromechanical device | impact riveters |
| 956,849 | May 03, 1910 | W.C. Hafemeister | Portable electric drill | handheld power tools |
| 993,352 | May 30, 1911 | W.O. Duntley | Electric drill | handheld power drills |
| 1,024,026 | Apr. 23, 1912 | G.H. Rowe | Electromechanical device | impact chisels and drills |
| 1,104,736 | Jul. 21, 1914 | F. Schneider | Gearing | handheld power drills |
| 1,109,325 | Sep. 01, 1914 | W.O. Duntley | Electric drill | handheld power drills |
| 1,172,169 | Feb. 15, 1916 | F. Schneider | Electrically-operated tool | handheld power tools |
| 1,229,401 | Jun. 12, 1917 | S.D. Black, A.G. Decker | Drill gearing | handheld power tools |
| 1,253,199 | Jan. 08, 1918 | H.L. Zabriskie | Oscillating motor | |
