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| Patents for William P. Huffman | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,808,074 | Jun. 02, 1931 | W.P. Huffman, F.F. Rike | Valve | ||
| 1,963,270 | Jun. 19, 1934 | F.F. Rike, W.P. Huffman | Pressure relief attachment | ||