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| Patents for Gates Iron Works | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 201,646 | Mar. 26, 1878 | C.M. Brown | Improvement in ore crushers and grinders | |
 | 341,900 | May 18, 1886 | P.W. Gates | Stone Breaker and Ore Crusher | |
 | 525,443 | Sep. 04, 1894 | P.W. Gates, E.E. Hanna, C.L. Carman | Gyrating crusher | |
 | 606,543 | Jun. 28, 1898 | E.E. Hanna | Self-lubricating engine | |
 | 616,658 | Dec. 27, 1898 | P.W. Gates, A.J. Gates | Rock or Ore Breaker | |
 | 616,659 | Dec. 27, 1898 | T.W. Capen, P.W. Gates | Rock or Ore Breaker | |