| Patents for H. M. Corwin |
Patents 1 -
15
of 16
      |
| Number | Date | Patentee | Title | Type |
| 447,805 | Mar. 10, 1891 | R. Yanda | Calipers | calipers |
| D20,771 | May 26, 1891 | C.W. Hubbard | Design for an Ax | axes |
| 460,590 | Oct. 06, 1891 | P. Meyer | Pliers | pliers |
| 496,190 | Apr. 25, 1893 | H. Cooper | Wrench | nut wrenches |
| 512,159 | Jan. 02, 1894 | H. Cooper | Wrench | quick adjust wrenches |
| 512,938 | Jan. 16, 1894 | D.W. Black | Sucker Rod Elevator and Wrench | wrenches |
| RE11,459 | Dec. 18, 1894 | G.P. Woelfel | Pipe Wrench | pipe wrenches |
| 538,994 | May 07, 1895 | G.P. Woelfel | Pipe Wrench | pipe tongs |
| 553,037 | Jan. 14, 1896 | A. Mertes | Gear-cutting machine | gear making machines |
| 580,273 | Apr. 06, 1897 | W.W. Grier | Boring and doweling machine | drilling and boring |
| 600,389 | Mar. 08, 1898 | H.C. Swan | Screw Clamp | C clamps |
| 738,565 | Sep. 08, 1903 | T.D. Cobedesh, W.A. McGuire | Wrench | screw adjust wrenches |
| 1,054,413 | Feb. 25, 1913 | I.E. Hindman | Lifting-jack | vehicle mechanic |
| 1,089,704 | Mar. 10, 1914 | I.E. Hindman | Rail-fastening | track and switches |
| 1,093,269 | Apr. 14, 1914 | I.E. Hindman | Jack | |
