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| All Patents in class 33/491 | |||||
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| Number | Date | Patentee | Title | Type | |
| 95,964 | Oct. 19, 1869 | J.S. Zerbee | Improvement in Combination Tools | countersinks | |
| 857,416 | Jun. 18, 1907 | M.M. Schwartz | Draftsman's Scale | rules | |