Number | Date | Country | Kind |
---|---|---|---|
2-300185 | Nov 1990 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3999443 | Appel et al. | Dec 1976 | |
4103292 | Haas | Jul 1978 | |
4147058 | Matsushita | Apr 1979 | |
4357835 | Kayama | Nov 1982 | |
4513624 | McHale et al. | Apr 1985 |
Entry |
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Bopp & Reuther, Magnetic-Inductive Standard Frequency Field with Preamplifier, Type MDM-NFV, Jul. 1988. |