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| US3940215 | 26 Dic 1973 | 24 Feb 1976 | Matsushita Electric Industrial Co., Ltd. | Blower | | US4002109 | 30 May 1975 | 11 Ene 1977 | Matsushita Electric Industrial Co., Ltd. | Blower | | US4084918 | 6 Ago 1974 | 18 Abr 1978 | Turbomachines, Inc. | Wind motor rotor having substantially constant pressure and relative velocity for airflow therethrough |
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