| All Patents in class 173/217 |
Patents 1 -
15
of 22
      |
| Number | Date | Patentee | Title | Type |
| 255,236 | Mar. 21, 1882 | C.E. Ball | Electric drill | handheld power drills |
| 595,731 | Dec. 21, 1897 | M.B. Pengnet | Electric motor | electric motors |
| 750,744 | Jan. 26, 1904 | J.F. Willey | Portable 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 |
| 993,352 | May 30, 1911 | W.O. Duntley | Electric drill | handheld power drills |
| 1,004,437 | Sep. 26, 1911 | A. Kimble | Alternating-current motor | electric motors |
| 1,423,511 | Jul. 25, 1922 | J.N. Baker | Routing tool | handheld routers |
| 1,502,169 | Jul. 22, 1924 | C.B. Bennett | Electric tool | handheld power drills |
| 1,548,020 | Aug. 04, 1925 | S.D. Black, A.G. Decker | Reversing means for electric tools | handheld power tools |
| 1,699,870 | Jan. 22, 1929 | S.D. Black, A.G. Decker | Portable tool | handheld power tools |
| 1,702,742 | Feb. 19, 1929 | W. Moretti | Electric tool | handheld power drills |
| 1,754,222 | Apr. 15, 1930 | E.L. Connell | Electric drill | |
| 1,850,191 | Mar. 22, 1932 | G.R. Wilcox | Electric drill | handheld power drills |
| 2,155,082 | Apr. 18, 1939 | A.G. Decker | Portable electric tool and casing | handheld power drills |
