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| All Patents in class 234/116 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,391,863 | Jul. 09, 1968 | H.W. Huffman, R.W. Morner | Data card punching device | ||
| 3,948,135 | Apr. 06, 1976 | M.J. A | Machine tool | ||