| Patents for H. A. Kerr |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 607,709 | Jul. 19, 1898 | S.J. Shimer | Cutter-head | cutterheads |
| 614,771 | Nov. 22, 1898 | S.J. Shimer | Cutter-head | cutterheads |
| 650,764 | May 29, 1900 | S.J. Shimer | Cutter-head | cutterheads |
| 651,728 | Jun. 12, 1900 | S.J. Shimer | cutter-head | cutterheads |
| 668,586 | Feb. 19, 1901 | S.J. Shimer | Cutter-head | cutterheads |
| 719,266 | Jan. 27, 1903 | E.S. Shimer | Cutter-head | cutterheads |
| 826,371 | Jul. 17, 1906 | E.S. Shimer, G.S. Shimer | Cutter-head | cutterheads |
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