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| All Patents in class 83/503 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 197,596 | Nov. 27, 1877 | W. Brown | Machine for Spitting and Flaring Hoop-Iron | ||
 | 204,782 | Jun. 11, 1878 | H. Atkinson | Improvement in circular-saw mills | |
| 3,863,537 | Feb. 04, 1975 | C.E. Huelsman | Rotating lock for slitter apparatus | ||
| 4,046,042 | Sep. 06, 1977 | M. Payeur | Circular shear cutting device | ||