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| Patents for Marshall D. Williamson | |||||
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| Number | Date | Patentee | Title | Type | |
| 341,866 | May 18, 1886 | J.R. Allgire | Machine for the manufacture of veneer barrels | barrel making machines | |
| 342,672 | May 25, 1886 | J.R. Allgire | Method of manufacturing veneer barrels | barrel making machines | |
| 526,337 | Sep. 18, 1894 | M.D. Williamson | Quarter-log holder for veneer-cutting machines | veneer machines | |