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| All Patents in class 12/91 | |||||
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| Number | Date | Patentee | Title | Type | |
| 118,907 | Sep. 12, 1871 | M.W. Clark | Improvement in cutter-heads for molding-machines | cutterheads | |
| 205,296 | Jun. 25, 1878 | J.A. Peer | Adjusting cutters | cutterheads | |
| 284,630 | Sep. 11, 1883 | D.P. Hall | Cutter Head | shoe and boot making machines | |
| 477,428 | Jun. 21, 1892 | G.H. Marsh | Feed-roll | wood planers | |