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| Patents for H. Chapin's Son | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 134,729 | Jan. 14, 1873 | J.W. Butler | Twist-Lock Marking Gage | |
 | 465,664 | Dec. 22, 1891 | M. Hogarty | Rule | |
 | 630,100 | Aug. 01, 1899 | J.F. O'Neil | Combination Rule | |