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| Patents for Richard S. Hartley | |||||
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| Picture | Number | Date | Patentee | Title | |
| 3,014,515 | Dec. 26, 1961 | R.S. Hartley, D.A. Meeker | Food processing machine | ||
| 3,051,207 | Aug. 28, 1962 | R.S. Hartley | Food handling apparatus | ||
| 3,054,431 | Sep. 18, 1962 | R.S. Hartley, H.D. Hannah | Food processing machinery | ||
| 3,091,269 | May 28, 1963 | R.S. Hartley, R.H. Burns | Food handling apparatus | ||