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| All Patents in class 277/403 | |||||
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| Number | Date | Patentee | Title | Type | |
| 692,243 | Feb. 04, 1902 | W.E. Copenhaver | Mill | grinding mills | |
| 1,070,087 | Aug. 12, 1913 | J.H. Van Deventer | Metallic Packing | steam engine packing | |