| All Patents in class 74/397 |
Patents 1 -
10
of 13
      |
| Picture | Number | Date | Patentee | Title |
| | 294,221 | Feb. 26, 1884 | J.R. Gorrell, J. Miller | Circular saw mill |
| | 534,008 | Feb. 12, 1895 | F.A. Pratt | Drop Hammer |
| | 700,647 | May 20, 1902 | J. Hartness | Power Transmission Mechanism |
| | 702,895 | Jun. 17, 1902 | C.O. White | Sparking Device |
| | 799,587 | Sep. 12, 1905 | O.J. Beale | Rack-Cutting Machine |
 | 860,046 | Jul. 16, 1907 | C.R. Meston | Machine-operating mechanism |
 | 871,193 | Nov. 19, 1907 | E.W. Stull | Arrangement for motor-drives |
 | 1,739,826 | Dec. 17, 1929 | O. Cullman | Electric Low Speed Unit |
 | 1,786,192 | Dec. 23, 1930 | O. Cullman | Support for Electric Motors |
| | 2,195,912 | Apr. 02, 1940 | W.F. Zimmermann | Worm Gearing |
