Number | Date | Country | Kind |
---|---|---|---|
58-247689 | Dec 1983 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
2077707 | Melton | Apr 1937 | |
3351936 | Feder | Nov 1967 | |
3831173 | Lerner | Aug 1974 | |
3896434 | Sirven | Jul 1975 | |
4218678 | Fowler et al. | Aug 1980 | |
4504833 | Fowler et al. | Mar 1985 |
Entry |
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Electronic Communications Society Technical Research Report, pp. 21-28, "Underground Radar System" (T. Suzuki et al); vol. 79, No. 220, 1980. |
M. Skolnik, Intro. to Radar Systems; pp. 76-77, (McGraw-Hill, 1980). |