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| Patents for I. W. Chapman | |||||
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| Number | Title | Classification(s) | |||
| 985,389 | Metal Butt Gage | 33/44 | |||
| 1,032,346 | Brass Bushings to Secure Transitional Frogs | 30/478 | |||
| 1,053,356 | Knuckle-Joint Blockplane Levercap | 30/436, 30/478 | |||