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| All Patents in class 29/893 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 3,044,790 | Jul. 17, 1962 | A.M. Stoner | Chuck and operating key with enlarged pilot | |
| 3,276,135 | Oct. 04, 1966 | W.B. McCardell | Gear Tooth Checking System | ||