| All Patents in class 74/56 |
Patents 1 -
10
of 10
      |
| Number | Date | Patentee | Title | Type |
| 694 | Apr. 14, 1838 | C. Learned, S. Waterman | Brick Machine | brick and tile making machines |
| 127,747 | Jun. 11, 1872 | J. Donnelly | Improvement in Apparatus for Operating Steam-Engine | steam engines |
| 602,693 | Apr. 19, 1898 | S.P. Blackmore | Rock or Like Drill | |
| 1,356,297 | Oct. 19, 1920 | A.T. Lochner | Power-hammer | |
| 1,660,579 | Feb. 28, 1928 | J. Roth | Hammer drill attachment for electric drill | handheld power tool accessories |
| 1,679,884 | Aug. 07, 1928 | H.T. Thomas | Attachment for drills | handheld power tool accessories |
| 2,215,222 | Sep. 17, 1940 | D.D. Levy | Dental Tool Holder | dental tools |
| 2,408,484 | Oct. 01, 1946 | A.R. Schwarzkopf | Percussive tool | handheld power tools |
| 2,728,974 | Jan. 03, 1956 | C.E. Miller | Automatic Lathe | automatic lathes |
| 2,903,234 | Sep. 08, 1959 | H. Steinhauer, V.v. Sundt | Timed Valve with Cam Actuator | metalworking machine mechanisms |
