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| Patents for Charles E. Huelsman | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,863,537 | Feb. 04, 1975 | C.E. Huelsman | Rotating lock for slitter apparatus | ||
| 3,934,836 | Jan. 27, 1976 | J.H. Muhlenkamp, C.E. Huelsman, D.L. Dunlap | Mandrel assembly | ||