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| Patents for Isaac B. Hartwell | |||||
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| Number | Title | Classification(s) | |||
| 681 | Crosscut eclipse shearing-machine for shearing woolen cloths | 26/15R, 48/124, 48/94 | |||
| 13,169 | Machine for cutting cavities spherical, ellipsoidal, &c. | 144/134.1, 144/33, 280/124.113 | |||