| All Patents in class 81/34 |
Patents 46 -
60
of 63
      |
| Number | Date | Patentee | Title | Type |
| 1,046,223 | Dec. 03, 1912 | J.H. Rusby | Breast-drill | breast drills |
| 1,052,423 | Feb. 04, 1913 | T. Prentice | Boring and drill tool | eggbeater drills |
| 1,059,242 | Apr. 15, 1913 | J.C. Wells, A.F. Wells | Bit-stock | |
| 1,065,360 | Jun. 24, 1913 | H. Harris | Geared bit-stock | |
| 1,083,784 | Jan. 06, 1914 | G.L. Wilcox | Locking Device for Hand Drills | eggbeater drills |
| 1,275,197 | Aug. 13, 1918 | J. Auer | Drill | breast drills |
| 1,353,902 | Sep. 28, 1920 | C.W. Herberger | Driving Mechanism For Grinding Tools | valve grinding tools |
| 1,474,679 | Nov. 20, 1923 | V.G. Lutz | Hand drill provided with a speed-changing device | hand drills |
| 1,493,141 | May 06, 1924 | C. Bodmer | Hand drill frame | eggbeater drills |
| 1,493,142 | May 06, 1924 | C. Bodmer | Hand drill pedestal | |
| 1,536,758 | May 05, 1925 | C. Bodmer | Hand drill or the like | |
| 1,540,749 | Jun. 09, 1925 | A.A. Beach | Screw Driving Device | screwdriver mechanisms |
| 1,575,953 | Mar. 09, 1926 | P. Toorks | Attachment for drilling machines | handheld power tool accessories |
| 1,633,400 | Jun. 21, 1927 | G.O. Leopold, T.J. Fegley | Breast drill | |
| 1,642,986 | Sep. 20, 1927 | C. Bodmer | Hand drill | |
