| All Patents in class 72/438 |
Patents 46 -
60
of 62
      |
| Number | Date | Patentee | Title | Type |
| 996,194 | Jun. 27, 1911 | H. Averdung | Tilt Hammer | power hammers |
| 1,035,968 | Aug. 20, 1912 | J.L. Kelley | Trip Hammer | trip and helve hammers |
| 1,053,744 | Feb. 18, 1913 | J.H. Philips | Spring Hammer | riveting tools |
| 1,075,950 | Oct. 14, 1913 | R.R. Smith | Spring Hammer | riveting tools |
| 1,236,632 | Aug. 14, 1917 | J. Vincent | Oliver or Tilt Hammer | trip and helve hammers |
| 1,271,276 | Jul. 02, 1918 | J.N. Cayo | Riveting Machine | power hammers |
| 1,342,782 | Jun. 08, 1920 | A. Vincent | Trip Hammer | trip and helve hammers |
| 1,400,166 | Dec. 13, 1921 | E.F. Karlson | Power Hammer | power hammers |
| 1,441,047 | Jan. 02, 1923 | W. Vollmer | Machine for Bending Metal | metal bending machines |
| 1,798,309 | Mar. 31, 1931 | W.W. Criley | Four Roll Hammer | power hammers |
| 1,868,476 | Jul. 19, 1932 | F.J. Vlchek | Drop Hammer | drop hammers |
| 1,954,156 | Apr. 10, 1934 | F.J. Vlchek | Drop Hammer | drop hammers |
| 1,954,157 | Apr. 10, 1934 | F.J. Vlchek | Drop Hammer | drop hammers |
| 2,220,037 | Oct. 29, 1940 | R.P. Fitzgerald | Double-acting drop hammer | drop hammers |
| 3,464,315 | Sep. 02, 1969 | H.A. Weyer | Mechanical pneumatic servo control system for high-speed impact devices | drop hammers |
