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| Patents for Ralph L. Goetzel | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,012,065 | Aug. 20, 1935 | R.L. Goetzel, F.S. Haas | Grinding Machine | grinding machines | |
| 2,040,990 | May 19, 1936 | R.L. Goetzel, F.S. Haas | Hydraulic Control Mechanism | grinding machines | |