| Patents for Cogsdill Twist Drill Co., Inc. |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
| | 2,148,805 | Feb. 28, 1939 | S.A. Cogsdill | Method of Making Oil Hole Drills |
| | 2,170,631 | Aug. 22, 1939 | S.A. Cogsdill | Bearingizing Tool |
| | 2,206,941 | Jul. 09, 1940 | S.A. Cogsdill | Reamer |
| | 2,358,304 | Sep. 19, 1944 | S.A. Cogsdill | Method of Making Oil Hole Twist Drills |
| | 2,526,732 | Oct. 24, 1950 | S.A. Cogsdill | Container for Holding a Set of Drills and Punch |
| | 2,620,689 | Dec. 09, 1952 | S.A. Cogsdill | Deburring Tool Having a Slender Body for Projecting Into an Aperture |
| | 2,710,549 | Jun. 14, 1955 | S.A. Cogsdill | Micro-limit Countersink Driver |
