| All Patents in class 91/191 |
Patents 1 -
10
of 10
      |
| Picture | Number | Date | Patentee | Title |
| | 13,320 | Jul. 24, 1855 | H.R. Worthington | Water-meter |
| | 116,131 | Jun. 20, 1871 | H.R. Worthington | Improvement in steam pumping-engines |
| | 181,548 | Aug. 29, 1876 | H.R. Worthington | Improvement in compound engines |
| | 278,133 | May 22, 1883 | W.H. Guild | Duplex Direct Acting Engine |
| | 358,591 | Mar. 01, 1887 | E.E. Clark | Vertical Compound Balanced Duplex Pumping Engine |
| | 655,232 | Aug. 07, 1900 | C.L. Heisler | Pumping Engine |
| | 2,043,420 | Jun. 09, 1936 | E.G. Roehm | Broaching Machine |
| | 2,365,040 | Dec. 12, 1944 | A.L. Hamelberg, W.D. Averill | Broaching Machine |
 | 2,500,933 | Mar. 21, 1950 | L.A. Dailey | Control device for machine tools |
| | 2,709,395 | May 31, 1955 | E.C. Rogers, C.A. Boehm | Broaching Machine |
