| All Patents of Type: impact chisels and drills |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 481,598 | Aug. 30, 1892 | W.X. Stevens | Rock-drilling machine | impact chisels and drills |
| 1,024,025 | Apr. 23, 1912 | G.H. Rowe | Percussion device | impact chisels and drills |
| 1,024,026 | Apr. 23, 1912 | G.H. Rowe | Electromechanical device | impact chisels and drills |
| 1,298,966 | Apr. 01, 1919 | J.S. Knowlson | Electrically-operated tool | impact riveters |
| CA-218,476 | May 09, 1922 | J.S. Knowlson | Electrically operated tool | impact riveters |
| DE-390,538 | Feb. 20, 1924 | J.S. Knowlson | electrically driven impact tool | impact riveters |
| 1,598,088 | Aug. 31, 1926 | J. Larocca, J.S. Knowlson | Mechanical movement | impact chisels and drills |
| 1,598,090 | Aug. 31, 1926 | J. Larocca | Impacting tool | impact chisels and drills |
| 1,598,091 | Aug. 31, 1926 | J. Larocca | Impacting tool | impact chisels and drills |
| 2,757,007 | Jul. 31, 1956 | S.N. Levy | Shank and bushing assembly for pneumatic tools | pneumatic tools |
| 3,269,466 | Aug. 30, 1966 | W.G. Mitchell | Impact tool | impact chisels and drills |
| 3,650,336 | Mar. 21, 1972 | H.P. Koehler | Power driven device | impact chisels and drills |
