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| Patents for Eugene L. Ritter | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,572,759 | Oct. 23, 1951 | E.L. Ritter | Screw-Cutting Lathe | metal lathe mechanisms | |
| 2,711,114 | Jun. 21, 1955 | E.L. Ritter, M. Romaine | Cross Slide Mechanism | engine lathes | |
| 3,037,329 | Jun. 05, 1962 | W.A. Haggerty, E.L. Ritter, H. Ernst | Method and Apparatus for Grinding Drills | drill sharpening machines | |