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| All Patents in class 182/141 | |||||
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| Number | Date | Patentee | Title | Type | |
| 221,855 | Nov. 18, 1879 | B.B. Oppenheimer | Parachute hat | ||
| 2,948,363 | Aug. 09, 1960 | F.P. Hopfeld | Telescoping elevators | transportation | |