| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 81 | Propeller having angularly disposed tip | US35783573 | 1973-05-07 | US3854845A | 1974-12-17 | VAN DE WATER F |
| A propeller which is given increased efficiency and rendered more silent in operation by shaping its tip edges to have, in addition to the usual pitch angularity, a second angularity causing the tip edge to advance progressively radially outward as it advances circularly, and specifically at a critical optimum angle of 71.5 degrees with respect to a line drawn directly radially outwardly from the axis of the propeller and intersecting the tip edge.
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| 82 | Propeller | US27471363 | 1963-04-22 | US3171495A | 1965-03-02 | PUCKETT WILLIAM H |
| 83 | Propeller blades | US82675859 | 1959-07-13 | US3112797A | 1963-12-03 | MAX REICHELT |
| 84 | Propeller blade shank | US44223854 | 1954-07-09 | US2758658A | 1956-08-14 | DAKIN GUY L |
| 85 | Propeller blade stress distributing means | US78812947 | 1947-11-26 | US2623599A | 1952-12-30 | KEARNS JR CHARLES M |
| 86 | Propeller blade | US73784647 | 1947-03-28 | US2620885A | 1952-12-09 | LAMPTON GLEN T; ERLE MARTIN |
| 87 | Turbo-propeller | US3082948 | 1948-06-03 | US2616511A | 1952-11-04 | WILLIAM PERROTT |
| 88 | Compound propeller blade | US69960746 | 1946-09-27 | US2514487A | 1950-07-11 | GRIESE ELMER G |
| 89 | Propeller | US30885339 | 1939-12-12 | US2283068A | 1942-05-12 | JOHNSON HARRY J |
| 90 | Propeller | US27127039 | 1939-05-02 | US2199823A | 1940-05-07 | PETER KESSERY |
| 91 | Airplane propeller blade | US18801038 | 1938-01-29 | US2175609A | 1939-10-10 | FRANK LEEB |
| 92 | Propeller | US18786538 | 1938-01-31 | US2149951A | 1939-03-07 | BAKER EDWARD C |
| 93 | Propeller | US17827337 | 1937-12-06 | US2148555A | 1939-02-28 | HICKS ELIAS S |
| 94 | Propeller | US8609136 | 1936-06-19 | US2083992A | 1937-06-15 | HALL HAROLD A |
| 95 | Propeller | US73240034 | 1934-06-26 | US2080224A | 1937-05-11 | WILLIAM LILY |
| 96 | Fluid reaction apparatus | US5250335 | 1935-12-02 | US2072322A | 1937-03-02 | UPSON WALTER L |
| 97 | Propeller blade | US72577834 | 1934-05-15 | US2053851A | 1936-09-08 | TECHMER EWALD F |
| 98 | Air propeller | US68479933 | 1933-08-12 | US2024241A | 1935-12-17 | KATHERINE MICHAUD |
| 99 | Propeller | US70449333 | 1933-12-29 | US2014242A | 1935-09-10 | JOHN WEICHWALD |
| 100 | Propeller | US47398830 | 1930-08-08 | US2003073A | 1935-05-28 | FABER GUY S |
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