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| All Patents in class 220/844 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,158,972 | May 16, 1939 | F. Weindel, Jr. | Box construction | |
| 3,120,879 | Feb. 11, 1964 | D.J. Warner | Oil Cup With Integral Spring | ||