Number | Name | Date | Kind |
---|---|---|---|
1838146 | Klopsteg | Dec 1931 | |
3109946 | Pontin | Nov 1963 | |
3214662 | De Wolf | Oct 1965 | |
3644809 | Lahde | Feb 1972 | |
3678310 | Munn et al. | Jul 1972 | |
3794824 | Bacevius | Feb 1974 | |
3835309 | Witte et al. | Sep 1974 | |
4764698 | Murakami | Aug 1988 | |
5217824 | Womack | Jun 1993 |
Entry |
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Edwin P. Anderson and Rex Miller Electric Motors 1983 pp. 16-17, 40-43 month unknown. |
John D. Kraus Electromagnetics Fourth Edition pp. 284-295 date unknown. |
Instruction Book for Electro-magnetix 1991 Educational Design, Inc., pp. 2-3, 26-31 month unknown. |