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| All Patents in class 83/40 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,005,369 | Oct. 24, 1961 | F. Koster | Method of Notching and Shearing the Ends of Tubing in the Preparation of Tubular Assemblies | pipe and tube notchers | |
| 3,074,302 | Jan. 22, 1963 | H. May, E. Coulon | Method of Preparing Mitered Tubular Joints | pipe and tube notchers | |
| 3,268,136 | Aug. 23, 1966 | H.W. Huffman | Data card and method of making same | ||