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| Patents for Wilcox-Rich Corp | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,772,082 | Aug. 05, 1930 | J.H. Hoern | Device for Assembling and Holding Piston Rings for Machining Operations | metalworking machine mechanisms | |
| 1,783,121 | Nov. 25, 1930 | J.H. Hoern | Piston Ring Burr Removing Device | surface grinders | |
| 1,910,767 | May 23, 1933 | J.H. Hoern | Method of making tappets | gas and gasoline engines | |
| 1,925,384 | Sep. 05, 1933 | J.H. Hoern | Ring Resawing Machine | metal cutting circular saws | |