| Patents for Electro-Magnetic Tool Co. |
Patents 1 -
15
of 18
      |
| Number | Date | Patentee | Title | Type |
| 894,782 | Jul. 28, 1908 | G.H. Rowe | Rock hammer-drill | handheld power hammers |
| CA-120,598 | Sep. 21, 1909 | G.H. Rowe | Rock hammer-drill | handheld power hammers |
| 938,708 | Nov. 02, 1909 | G.H. Rowe | Stamp mill | ore processing apparatus |
| 938,709 | Nov. 02, 1909 | G.H. Rowe | Electromechanical device | impact riveters |
| 973,216 | Oct. 18, 1910 | G.H. Rowe | Electromechanical device | impact riveters |
| 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 |
| 1,024,027 | Apr. 23, 1912 | G.H. Rowe | Electromechanical device | power hammers |
| 1,062,799 | May 27, 1913 | G.H. Rowe | Rock drill | miner |
| 1,082,880 | Dec. 30, 1913 | J.S. Knowlson | Mechanical hammer | miner |
| 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 |
| 1,577,976 | Mar. 23, 1926 | J.S. Knowlson, R.S. McKeage | Power-driven tool-operating device | handheld power drills |
| 1,598,088 | Aug. 31, 1926 | J. Larocca, J.S. Knowlson | Mechanical movement | impact chisels and drills |
