Number | Name | Date | Kind |
---|---|---|---|
3736591 | Rennels et al. | May 1973 | |
4625212 | Oda et al. | Nov 1986 | |
4862181 | Ponce de Leon et al. | Aug 1989 | |
5048118 | Brooks et al. | Sep 1991 | |
5113196 | Ponce de Leon et al. | May 1992 |
Entry |
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Hall et al, The ARRL Antenna Book, 1983, pp. 15-7-15-12. |