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| Patents for Wm. Gardam & Son | |||||
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| Number | Date | Patentee | Title | Type | |
| 123,886 | Feb. 20, 1872 | W. Gardam, J. Gardam | Improvement in drilling-machines | drilling and boring | |
| 682,585 | Sep. 10, 1901 | J.W. Gardam, H.D. Cotter | Dipping-needle compass | ||