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| Patents for William D. Averill | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,940,112 | Dec. 19, 1933 | W.D. Averill | Milling Machine | milling machines | |
| 2,225,731 | Dec. 24, 1940 | W.D. Averill | Broaching Machine | broaching machines | |
| 2,365,040 | Dec. 12, 1944 | A.L. Hamelberg, W.D. Averill | Broaching Machine | broaching machines | |
| 2,747,271 | May 29, 1956 | W.D. Averill, E.C. Raehrs | Process of Machining | machining | |
| 3,221,404 | Dec. 07, 1965 | D.I. McDonald, W.D. Averill | Cutting Tool Adapter | tool changers and storage mechanisms | |