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| All Patents in class 221/236 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,583,904 | May 11, 1926 | D.R. Tanner | Unstacker | sawmill accessories | |
| 2,747,769 | May 29, 1956 | W.E. Erickson | Seal Stripping and Opening Device | bottle cappers | |
| 2,752,030 | Jun. 26, 1956 | W.E. Erickson | Magnetic Seal Clamp | bottle cappers | |