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| All Patents in class 277/500 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 203,553 | May 14, 1878 | T. Northey | Improvement in double stuffing-boxes for steam-pumps | |
| 610,004 | Aug. 30, 1898 | A.H. Dingman | Gas Engine | ||
| 680,820 | Aug. 20, 1901 | G.A. Thode | Lubricating Device for Gas Engines | ||
| 1,580,701 | Apr. 13, 1926 | C.J. Travers | Guard for bearings | ||
| 1,855,193 | Apr. 26, 1932 | D.C. Klausmeyer | Oilproof Spindle End | ||