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All Patents in class 15/104.02 | |||||
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Picture | Number | Date | Patentee | Title | |
341,938 | May 18, 1886 | C.L. Perkins | Cleaning Tool | ||
![]() | 1,132,396 | Mar. 16, 1915 | C.I. Sedlmayer, J.W. Brooks | Adjustable Valve Reseating or Milling Tool |