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United States Patent (19) : Stevenson, IV 11 Patent Number: 5,014,637 (45) Date of Patent: May 14, 1991
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United States Patent: (54) - Parasail, Glidertype Aerial
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April 2, 1963 R. T. Cella 3,083,933 Ski Glider: Filed April 28, 1960 2. Sheets-Sheet L
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United States Patent: (10) Patent No.: (45) Date of Patent
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May 25, 1943. R. V. Jennings. 2,319,999: Filed Dec. 13, 1939 - 2 Sheets-Sheet 1
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