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| All Patents in class 277/515 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 759,330 | May 10, 1904 | A.O. Van Dervort | Packing | ||
| 2,287,456 | Jun. 23, 1942 | R.C. Springston | Sealing Means | ||
 | 2,300,747 | Nov. 03, 1942 | E.C. Read | Steam engine | |
 | 2,424,190 | Jul. 15, 1947 | E.C. Read | Stuffing box | |