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| Patents for David Smail | |||||
| Number | Date | Patentee | Title | Type | |
| 659,003 | Oct. 02, 1900 | D. Smail, C.W. Taylor | Valve-Operating Mechanism | steam engine valve gear | |
| GB-190,011,371 | Apr. 27, 1901 | J. Storey, D. Smail, C.W. Taylor | Improvements in or Relating to Engine Valve Gear | steam engine valve gear | |