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| All Patents in class 72/158 | |||||
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| Number | Date | Patentee | Title | Type | |
| 842,111 | Jan. 22, 1907 | C.A. Smith, H.A. Pedrick | Pipe Bending Machine | metal bending machines | |
| 878,604 | Feb. 11, 1908 | L.H. Brinkman | Machine for Bending Pipe | pipe bending machines | |
| 2,514,831 | Jul. 11, 1950 | C.J. Bath | Apparatus for Selectively Wipe Forming and Stretch Forming Metal Stock | metal stretch forming machines | |