| Patents for Howard Iron Works |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
 | 33,550 | Oct. 22, 1861 | B.F. Taber | Improvement in rotary pumps |
 | 37,530 | Jan. 27, 1863 | B.F. Taber | Improvement in machines for rossing bark |
 | 48,594 | Jul. 04, 1865 | E. Schlenker | Bolt Cutter |
 | 91,199 | Jun. 15, 1869 | N. Baldwin | Improvement in Vise |
 | 156,066 | Oct. 20, 1874 | E. Schlenker | Improvement in vises |
 | 162,194 | Apr. 20, 1875 | E. Schlenker | Improvement in bolt-threading machines |
 | 166,730 | Aug. 17, 1875 | E. Schlenker | Improvement in hoisting-machines or elevators |
| | 698,465 | Apr. 29, 1902 | W.m. Dollar, D.H. Darrin | Hoisting Apparatus |
| | 1,381,509 | Jun. 14, 1921 | F.J. Schwimmer | Bolt-Heading Machine |
| | 1,613,369 | Jan. 04, 1927 | E.L. Worbois | Nut-Tapping Machine |
