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| Patents for Pratt, Whitney & Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 204,028 | May 21, 1878 | F.N. Gardner, N. Sawyer, J.J. Grant | Improvement in screw-cutting dies | taps and dies | |
| 230,158 | Jul. 20, 1880 | R.H. Thurston | Machine for testing lubricants | testing machines | |