| All Patents in class 173/127 |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
 | 271,781 | Feb. 06, 1883 | B. Brazelle | Steam-engine |
 | 278,600 | May 29, 1883 | J. Robson | Gas Engine |
 | 284,173 | Sep. 04, 1883 | B. Brazelle | Direct-acting engine |
 | 504,803 | Sep. 12, 1893 | D. Drawbaugh | Pneumatic tool |
| | 605,544 | Jun. 14, 1898 | R.J. Good | Drop Hammer |
| | 942,756 | Dec. 07, 1909 | W. Norris, T. Scott-King | Power Hammer |
 | 2,433,007 | Dec. 23, 1947 | C.S. Weyandt | Internal-combustion percussion tool |
 | 2,561,093 | Jul. 17, 1951 | V.W. Breitenstein, E.R. Boddinghouse | Internal-combustion rammer |
 | 2,612,868 | Oct. 07, 1952 | R.P. Fitzgerald | Pneumatic drop hammer |
