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| Patents for Hamilton Ruddick | |||||
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| Number | Date | Patentee | Title | Type | |
| 70,364 | Oct. 29, 1867 | H. Ruddick | Portable Locomotive Boiler | portable boilers | |
| 182,962 | Oct. 03, 1876 | H. Ruddick | Improvement in rivet-heading machines | rivet making machines | |
| 248,612 | Oct. 25, 1881 | H. Ruddick | Recording Dynamometer | dynamometers | |