| US Patent: 167,772 
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| Improved Phillips Patent Plow Plane | 
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| Patentee: |  |
 | Matthias C. Mayo (exact or similar names) - Boston, MA |  
 
 
 
 
 
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| Patent Dates: |  
| Granted: | Sep. 14, 1875 |  USPTO (New site tip)
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                        Steve Reynolds
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| Description: |  | Inventor Mayo discloses the improvement over sliding gage arms that are secured by thumbscrews as his new clamping device that does not mar the gage arms.  He also claims a screw-clamp for adjusting the cutter depth. |  |