| All Patents in class 181/230 |
Patents 1 -
6
of 6
      |
| Picture | Number | Date | Patentee | Title |
| | 1,725,212 | Aug. 20, 1929 | F. Schneider | Power hammer |
 | 2,545,453 | Mar. 20, 1951 | F.P. Forss | Portable rotary grinder or die filer |
| | 2,678,637 | May 18, 1954 | R.E. Doeden | Pneumatic tool construction |
 | 3,815,705 | Jun. 11, 1974 | D. Bennett | Muffler for a pneumatic percussion tool |
| | 4,879,847 | Nov. 14, 1989 | R.D. Giese, K.C. Happ, J.K. Butzen | Cover for Pneumatic Tool |
| | 5,309,714 | May 10, 1994 | K.C. Happ, G.A. Putney | Ratchet Tool with Exhaust Chamber Manifold with Sound Dampening Properties |
