| Patents for James Leffel & Co. |
Patents 1 -
15
of 40
      |
| Number | Date | Patentee | Title | Type |
| 4,056 | May 21, 1845 | J. Leffel | Improvement in water-wheels | water wheels |
| 20,921 | Jul. 13, 1858 | D.K. Kraatz | Turbine Water Wheel | turbine water wheels |
| 34,150 | Jan. 14, 1862 | J. Leffel | Improved water-wheel | turbine water wheels |
| RE1,791 | Oct. 11, 1864 | J. Leffel | Improvement in water-wheels | turbine water wheels |
| RE1,792 | Oct. 11, 1864 | J. Leffel | Improvement in cases for water-wheels | turbine 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 | water wheels |
| RE3,875 | Mar. 08, 1870 | D.K. Kraatz | Turbine Water Wheel | turbine water wheels |
| 459,969 | Sep. 22, 1891 | W.W. Tyler | Water Wheel | water wheels |
| 461,565 | Oct. 20, 1891 | F.M. Bookwalter, J.W. Bookwalter | Water Wheel | water wheels |
| 783,761 | Feb. 28, 1905 | A.F. Sparks | Water Wheel | turbine water wheels |
| 1,613,816 | Jan. 11, 1927 | G.A. Biggs | Runner for Turbines | turbine water wheels |
| 1,865,502 | Jul. 05, 1932 | G.A. Biggs | Hydraulic Turbine | turbine water wheels |
| 1,865,503 | Jul. 05, 1932 | G.A. Biggs | Hydraulic Turbine | turbine water wheels |
| 1,897,834 | Feb. 14, 1933 | G.A. Biggs | Hydraulic Turbine | turbine water wheels |
| 1,913,582 | Jun. 13, 1933 | G.A. Biggs | Generator for Hydraulic Turbine | turbine water wheels |
