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| All Patents in class 34/134 | |||||
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| Number | Date | Patentee | Title | Type | |
| 230,189 | Jul. 20, 1880 | W. Langner | Coffee Roaster | coffee roasters | |
| 324,182 | Aug. 11, 1885 | H. Stollwerck | Grain Dryer | coffee dryers | |
| 627,993 | Jul. 04, 1899 | D.B. Fraser | Coffee Roaster. | coffee roasters | |
| 719,717 | Feb. 03, 1903 | J. Arbuckle | Apparatus for Roasting Coffee | roasting coffee | |
| 1,518,966 | Dec. 09, 1924 | G.B. Damon | Drier | ore processing apparatus | |