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| All Patents in class 83/525 | |||||
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| Number | Date | Patentee | Title | Type | |
| 677,644 | Jul. 02, 1901 | J. Doolittle | Punching and shearing machine | metal punching machines | |
| 1,035,093 | Aug. 06, 1912 | H.B. Kraut | Punching and Shearing Machine | metal punching machines | |
| 1,972,327 | Sep. 04, 1934 | G.J. Blum | Power hacksaw | metal sawing machines | |