Number | Date | Country | Kind |
---|---|---|---|
3940036 | Dec 1989 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2744234 | Munday et al. | May 1956 | |
3881152 | Tasaki | Apr 1975 | |
4229697 | Petrosky et al. | Oct 1980 | |
4772848 | Hummel | Sep 1988 |
Number | Date | Country |
---|---|---|
903749 | Jun 1953 | DEX |
947932 | Mar 1956 | DEX |
2158715 | Nov 1971 | DEX |
2196127 | Oct 1987 | GBX |
Entry |
---|
"An Astatic Magnetometer with Negative Feedback", A. de Sa, J. Widdowson; Journal of Physics E., vol. 7, No. 4, pp. 266-268, Apr. 1974. |