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| All Patents in class 242/417.3 | |||||
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| Number | Date | Patentee | Title | Type | |
| 612,958 | Oct. 25, 1898 | I. Stone | Web tension device | ||
| 3,241,411 | Mar. 22, 1966 | H.W. Huffman | Method of and means for dampening transmission of shock and vibration impulses along continuously moving web | ||