| Patents for H. M. Corwin |
Patents 1 -
10
of 16
      |
| Picture | Number | Date | Patentee | Title |
 | 447,805 | Mar. 10, 1891 | R. Yanda | Calipers |
 | D20,771 | May 26, 1891 | C.W. Hubbard | Design for an Ax |
 | 460,590 | Oct. 06, 1891 | P. Meyer | Pliers |
 | 496,190 | Apr. 25, 1893 | H. Cooper | Wrench |
 | 512,159 | Jan. 02, 1894 | H. Cooper | Wrench |
 | 512,938 | Jan. 16, 1894 | D.W. Black | Sucker Rod Elevator and Wrench |
 | RE11,459 | Dec. 18, 1894 | G.P. Woelfel | Pipe Wrench |
 | 538,994 | May 07, 1895 | G.P. Woelfel | Pipe Wrench |
 | 553,037 | Jan. 14, 1896 | A. Mertes | Gear-cutting machine |
 | 580,273 | Apr. 06, 1897 | W.W. Grier | Boring and doweling machine |
