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| All Patents in class 72/2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,465,733 | Aug. 21, 1923 | J.H. Holmgreen | Bending Machine | sheet metal bending machines | |
| 3,142,206 | Jul. 28, 1964 | W.W. Hague, G.A. Householder | Control system for impact device | drop hammers | |