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| All Patents in class 30/416 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,091,524 | Aug. 31, 1937 | L.D. Roberts | Can Opener | can and jar openers | |
| 2,127,373 | Aug. 16, 1938 | M.J. Zimmer | Can Opener | can and jar openers | |