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| All Patents in class 101/181 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,863,387 | Dec. 09, 1958 | H.W. Huffman | Means for varying the phase relationship of the cylinders of a printing press | ||
| 3,841,216 | Oct. 15, 1974 | H.W. Huffman, H.W. Huffman | Method of and apparatus for correcting deviations in length and registration in a continuous strip of material | ||