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| All Patents in class 137/625.27 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,537,437 | May 12, 1925 | G. Graffinberger | Trimmer-saw mechanism | ||
| 1,629,712 | May 24, 1927 | S.L. Kneass | Injector | ||
 | 2,451,799 | Oct. 19, 1948 | W.R. Brown | Valve Structure | |