| All Patents in class 474/139 |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
 | 119,674 | Oct. 03, 1871 | W. Weaver | Improvement in Mechanical Movement |
 | 568,917 | Oct. 06, 1896 | H.W. Morgan | Power Transmitting Mechanism |
| | 618,190 | Jan. 24, 1899 | G.F. Sturgess | Chain Gear |
| | 803,556 | Nov. 07, 1905 | J.A. Charter | Power Driving Mechanism |
 | 2,099,218 | Nov. 16, 1937 | W.T. Pritchard, F.A. Nicholson | Driving mechanism to maintain constant the required length of an endless driving means |
 | 2,099,219 | Nov. 16, 1937 | W.T. Pritchard, F.A. Nicholson | Mechanism to maintain constant the required length of an endless driving means |
 | 2,099,220 | Nov. 16, 1937 | W.T. Pritchard, F.A. Nicholson | Mechanism to maintain constant the required length of an endless driving means |
