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| All Patents in class 474/903 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 394,729 | Dec. 18, 1888 | C.W. Shartle | Slip-collar for pulleys | |
| 630,868 | Aug. 15, 1899 | J.A. Dorman | Split Pulley | ||
| 646,414 | Apr. 03, 1900 | T. Corscaden | Pulley | ||
| 767,377 | Aug. 16, 1904 | R.H. Bowen | Sheave, wheel, or pulley | ||
| 788,185 | Apr. 25, 1905 | R.H. Bowen | Sheet-metal pulley | ||
 | 875,448 | Dec. 31, 1907 | R. Milne | Core and casting | |
 | 1,076,605 | Oct. 21, 1913 | H.P. Reston | Pulley | |
| 5,848,947 | Dec. 15, 1998 | R.A. Reinke, M.G. Brosier, D.L. Fornasiere | Split Power Transfer Member | ||