| All Patents in class 310/83 |
Patents 1 -
10
of 37
      |
| Picture | Number | Date | Patentee | Title |
 | 159,028 | Jan. 26, 1875 | G.F. Green | Improvement in electro-magnetic dental tools |
| | 595,731 | Dec. 21, 1897 | M.B. Pengnet | Electric motor |
 | 606,549 | Jun. 28, 1898 | E. Holmes | Portable electric drill |
 | 644,591 | Mar. 06, 1900 | W.P. Freeman | Electric drill, &c. |
 | 781,062 | Jan. 31, 1905 | D.J. Hauss, C.W. Miles | Electric or hand-powered breast drill |
 | 810,444 | Jan. 23, 1906 | C.W. Theil | Electric drill |
 | 938,709 | Nov. 02, 1909 | G.H. Rowe | Electromechanical device |
 | 956,849 | May 03, 1910 | W.C. Hafemeister | Portable electric drill |
| | 993,352 | May 30, 1911 | W.O. Duntley | Electric drill |
 | 1,024,026 | Apr. 23, 1912 | G.H. Rowe | Electromechanical device |
