| Patents for James Leffel & Co. |
Patents 1 -
10
of 40
      |
| Picture | Number | Date | Patentee | Title |
 | 4,056 | May 21, 1845 | J. Leffel | Improvement in water-wheels |
| | 20,921 | Jul. 13, 1858 | D.K. Kraatz | Turbine Water Wheel |
 | 34,150 | Jan. 14, 1862 | J. Leffel | Improved water-wheel |
 | RE1,791 | Oct. 11, 1864 | J. Leffel | Improvement in water-wheels |
 | RE1,792 | Oct. 11, 1864 | J. Leffel | Improvement in cases for water-wheels |
| | RE3,404 | Apr. 27, 1869 | J.W. Bookwalter, Executor, J.S. Goode, Executor, J. Leffel, deceased (Estate of) | Gate and Guide of Water Wheels |
| | RE3,875 | Mar. 08, 1870 | D.K. Kraatz | Turbine Water Wheel |
| | 459,969 | Sep. 22, 1891 | W.W. Tyler | Water Wheel |
| | 461,565 | Oct. 20, 1891 | F.M. Bookwalter, J.W. Bookwalter | Water Wheel |
| | 783,761 | Feb. 28, 1905 | A.F. Sparks | Water Wheel |
