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| All Patents in class 30/106 | |||||
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| Number | Date | Patentee | Title | Type | |
| 383,111 | May 22, 1888 | J. Duffy | Tube Expander | boiler repair tools | |
| 627,490 | Jun. 27, 1899 | J.P. Esveldt | Tube Cutter | tube making machines | |