| All Patents in class 144/234 |
Patents 31 -
45
of 61
      |
| 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 |
| 629,276 | Jul. 18, 1899 | S.J. Shimer | Cutter-head | cutterheads |
| 629,813 | Aug. 01, 1899 | W.W. Philbrick | Matcher-head | cutterheads |
| 629,814 | Aug. 01, 1899 | W.W. Philbrick | Matcher-head | cutterheads |
| 633,452 | Sep. 19, 1899 | C.R. Harvin | Matcher head | matchers |
| 650,764 | May 29, 1900 | S.J. Shimer | Cutter-head | cutterheads |
| 651,728 | Jun. 12, 1900 | S.J. Shimer | cutter-head | cutterheads |
| 652,695 | Jun. 26, 1900 | S.J. Shimer | Cutter-head | cutterheads |
| 655,126 | Jul. 31, 1900 | R. Stillwell | Cutter Head | cutterheads |
| 659,990 | Oct. 16, 1900 | S.J. Shimer | Cutter-head | cutterheads |
| 668,586 | Feb. 19, 1901 | S.J. Shimer | Cutter-head | cutterheads |
| 681,458 | Aug. 27, 1901 | W.W. Philbrick | Matcher-head | cutterheads |
| 681,459 | Aug. 27, 1901 | W.W. Philbrick | Matcher-head | cutterheads |
| 691,191 | Jan. 14, 1902 | E.S. Shimer | Expansible cutter-head | cutterheads |
