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| All Patents in class 474/91 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 295,999 | Apr. 01, 1884 | E.F. Gordon | Self-lubricating loose pulley | ||
 | 299,915 | Jun. 03, 1884 | D.C. Cumings | Counter-shaft | |
 | 615,883 | Dec. 13, 1898 | A.W. Nelson | Loose Pulley and Means for Attaching Same to Shafts | |