Number | Name | Date | Kind |
---|---|---|---|
1486040 | Schieferstein | Mar 1924 | |
3040976 | De Mattos | Jun 1962 | |
3206986 | Christensen | Sep 1965 | |
3620651 | Hufton | Nov 1971 | |
3821747 | Mason | Jun 1974 | |
4063826 | Riepe | Dec 1977 | |
4131874 | Geohegan, Jr. | Dec 1978 | |
4172427 | Kindred | Oct 1979 | |
4176976 | Lendl | Dec 1979 |
Number | Date | Country |
---|---|---|
167983 | Mar 1951 | ATX |
8002445 | Nov 1980 | WOX |
Entry |
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Toda et al., "Vibrational Fan Using the Piezoelectric Polymer PVF.sub.2 ", Proceedings of the IEEE, Aug. 1979, p. 1171. |