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| All Patents in class 277/562 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,687,464 | Aug. 29, 1972 | G.H. Schultz, R.H. Jackson | Seal | shaft seals | |
| 5,921,158 | Jul. 13, 1999 | J.H. Hoff, R.J. Slusar | Sealed Reversible Ratchet Wrench | ratchet wrenches | |