| All Patents in class 310/50 |
Patents 1 -
15
of 73
      |
| Number | Date | Patentee | Title | Type |
| 606,549 | Jun. 28, 1898 | E. Holmes | Portable electric drill | handheld power tools |
| 750,744 | Jan. 26, 1904 | J.F. Willey | Portable drill | handheld power tools |
| 781,062 | Jan. 31, 1905 | D.J. Hauss, C.W. Miles | Electric or hand-powered breast drill | handheld power tools |
| 809,394 | Jan. 09, 1906 | A. Pedersen | Electrically-operated portable drill | handheld power tools |
| 810,444 | Jan. 23, 1906 | C.W. Theil | Electric drill | handheld power tools |
| 956,849 | May 03, 1910 | W.C. Hafemeister | Portable electric drill | handheld power tools |
| 979,143 | Dec. 20, 1910 | E.F. Faure | Controlling device for electrical apparatus | handheld power tools |
| 1,004,437 | Sep. 26, 1911 | A. Kimble | Alternating-current motor | electric motors |
| 1,026,904 | May 21, 1912 | J. Burke | Electric motor | blowers |
| 1,062,799 | May 27, 1913 | G.H. Rowe | Rock drill | miner |
| 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 |
| 1,245,860 | Nov. 06, 1917 | S.D. Black, A.G. Decker | Electrically-driven tool | 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 |
