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| Patents for Otis Adams | |||||
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| Number | Date | Patentee | Title | Type | |
| GB-186,802,231 | Jul. 15, 1868 | O. Adams, J. Hatch | A new or improved tool or chisel for mortising machines | mortise chisels | |
| 82,058 | Sep. 15, 1868 | O. Adams, J. Hatch | Improvement in mortising-chisel | mortise chisels | |
| 130,099 | Aug. 06, 1872 | O. Adams | Puppet-valves | steam engine valves | |