| Patents for Frederick Curtis |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
| | 44,611 | Oct. 11, 1864 | S. Darling | Weighing Apparatus |
 | 54,731 | May 15, 1866 | L. Huntoon | Compound Steam Engine |
 | 55,599 | Jun. 19, 1866 | L. Bailey | Improvement in Spokeshaves |
| | 73,415 | Jan. 14, 1868 | H.O. Lothrop | Improvement in steam-engines cut-offs |
 | 75,034 | Mar. 03, 1868 | H.O. Lothrop | Improvement in steam-engines cut-offs |
 | 81,722 | Sep. 01, 1868 | H.H. Adams | Improvement in machines for carving wood |
 | 107,757 | Sep. 27, 1870 | T.O. Callahan | Improvement in planes |
 | 120,212 | Oct. 24, 1871 | R. Phillips | Improvement in Carpenters' Planes |
 | 170,981 | Dec. 14, 1875 | S.R. Bailey | Improvement in wood-bending machinery |
