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| All Patents in class 29/893.3 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,121,352 | Feb. 18, 1964 | W.B. McCardell | Tooth Forming Method and Apparatus | gear cutting tools | |
| 3,276,135 | Oct. 04, 1966 | W.B. McCardell | Gear Tooth Checking System | gear measuring machines | |