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| All Patents in class 292/256.67 | |||||
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| Number | Date | Patentee | Title | Type | |
| 407,559 | Jul. 23, 1889 | A.R. Wells | Hoop Clamp | clamps | |
| 3,071,398 | Jan. 01, 1963 | J.A. Henning | Locking Ring | industrial machine mechanisms | |