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| All Patents in class 261/122.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,922,749 | Aug. 15, 1933 | L. Roush | Cream whipping apparatus | dairy machinery | |
| 2,072,691 | Mar. 02, 1937 | R.E. Stark | Aerating apparatus | ||