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| Patents for H. A. Chapin | |||||
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| Number | Date | Patentee | Title | Type | |
| 652,602 | Jun. 26, 1900 | R.D. Earle | Grass or Corn Cutting Hook | grass or grain hooks | |
| D34,137 | Feb. 26, 1901 | E. Mercier | Bicycle Wrench | spoke nipple wrenches | |
| 965,970 | Aug. 02, 1910 | F.O. Wells | Tap Wrench | tap wrenches and die stocks | |