| All Patents in class 81/34 |
Patents 31 -
45
of 63
      |
| Number | Date | Patentee | Title | Type |
| 801,566 | Oct. 10, 1905 | P.B. Bloedel, A. Bennett | Brace-drill | geared braces |
| 862,069 | Jul. 30, 1907 | H.E. Goodell | Breast-drill | breast drills |
| 906,902 | Dec. 15, 1908 | G.O. Leopold | Speed-change gear | eggbeater drills |
| 915,562 | Mar. 16, 1909 | J.F. Daniel | Bit-stock for braces | braces |
| 930,620 | Aug. 10, 1909 | J.R. Sandberg | Combined breast-drill and valve-grinder | breast drills |
| 939,042 | Nov. 02, 1909 | G.O. Leopold | Gearing | eggbeater drills |
| 942,586 | Dec. 07, 1909 | W.J. Parsons | Drill brace | |
| 972,179 | Oct. 11, 1910 | W.C. Fox | Bit-holder | corner drills |
| 977,258 | Nov. 29, 1910 | O.R. Angell | Combined valve grinder and drill | eggbeater drills |
| 982,510 | Jan. 24, 1911 | G.O. Leopold | Ratchet mechanism | eggbeater drills |
| 988,723 | Apr. 04, 1911 | J.A. Leland | Change-speed gearing | eggbeater drills |
| 1,015,235 | Jan. 16, 1912 | G.O. Leopold | Gearing | eggbeater drills |
| 1,021,538 | Mar. 26, 1912 | G.O. Leopold | Gearing | eggbeater drills |
| 1,034,535 | Aug. 06, 1912 | R.P. Thompson | Portable drill, known as hand or breast drill | eggbeater drills |
| 1,034,838 | Aug. 06, 1912 | H.A. Ryther | Change-speed gearing | eggbeater drills |
