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| Patents for James Trehearne | |||||
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| Picture | Number | Date | Patentee | Title | |
 | XC-288 | Jun. 27, 1850 | J. Trehearne | A new method of constructing saw mills for sawing timber | |
 | XC-334 | Aug. 24, 1851 | J. Trehearne | A new method of running the perpendicular saw for sawing timber | |