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| All Patents in class 285/132.1 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 3,005,369 | Oct. 24, 1961 | F. Koster | Method of Notching and Shearing the Ends of Tubing in the Preparation of Tubular Assemblies | ||
| 3,074,302 | Jan. 22, 1963 | H. May, E. Coulon | Method of Preparing Mitered Tubular Joints | ||