| All Patents in class 408/223 |
Patents 31 -
39
of 39
      |
| Number | Date | Patentee | Title | Type |
| 1,004,902 | Oct. 03, 1911 | W. Potter | Boring-Bit | auger bits |
| 1,070,425 | Aug. 19, 1913 | A.C. Darling, Jr. | Countersinking drill | countersinks |
| 1,483,082 | Feb. 12, 1924 | H. Dosimont | Drill Bit or Auger | auger bits |
| 1,753,935 | Apr. 08, 1930 | O.M. Maisch | Cutter | valve reseating tools |
| 2,358,077 | Sep. 12, 1944 | A.C. Koett | Auger bit | auger bits |
| 2,360,385 | Oct. 17, 1944 | C.A. Anderson | Drill | drill bits |
| 2,689,131 | Sep. 14, 1954 | D.E. Priest | Screwdriver with removable blade | screwdriver blades |
| 2,794,468 | Jun. 04, 1957 | R.W. Huxtable | Woodcutting bit assembly | wood drill bits |
| 4,595,322 | Jun. 17, 1986 | B. Clement | Spade drill bit | drill bits |
