| All Patents in class 72/446 |
Patents 1 -
15
of 36
      |
| Number | Title | Classification(s) |
| RE2,389 | Trip Hammer | 72/432, 72/446 |
| 157,695 | Metal-Riveting Machines | 72/431, 72/446 |
| 217,725 | Improvement in machinery for shaping sheet metal | 72/446, 72/450 |
| RE10,324 | Drop-hammer | 72/446, 72/450 |
| 302,520 | Trip Hammer | 72/433, 72/446 |
| 327,999 | Power-hammer | 72/431, 72/446 |
| 357,255 | Oliver | 72/446, 72/451, 74/96 |
| 364,142 | Power-press | 72/446, 72/450 |
| 379,818 | Foot-power hammer | 72/441, 72/446, 72/451 |
| 417,201 | Foot-power hammer | 72/445, 72/446 |
| 435,264 | Reciprocating Electric Hammer | 72/430, 72/446 |
| 463,259 | Machine for Testing the Strengh of Metals | 72/437, 72/440, 72/446, 73/12.13 |
| 493,874 | Power Hammer | 72/434, 72/445, 72/446 |
| 497,013 | Power-hammer | 248/288.11, 72/431, 72/440, 72/446 |
| 520,876 | Rail or Bar Bender | 72/390.3, 72/446, 72/450 |
