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| Patents for William A. Haggerty | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,903,922 | Sep. 15, 1959 | W.A. Haggerty, H. Ernst | Self-Centering Drill | drill bits | |
| 3,037,329 | Jun. 05, 1962 | W.A. Haggerty, E.L. Ritter, H. Ernst | Method and Apparatus for Grinding Drills | drill sharpening machines | |
| 3,109,270 | Nov. 05, 1963 | W.A. Haggerty | Drill Grinding Method | drill grinders | |