Number | Name | Date | Kind |
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2248787 | Schrumpf | Jul 1941 | |
2768351 | Scholten et al. | Oct 1956 | |
2988713 | Fukata | Jun 1961 | |
3504317 | Sato et al. | Mar 1970 | |
3624565 | Harriset al. | Nov 1971 | |
3644848 | Kruczek | Feb 1972 | |
3733608 | McGray et al. | May 1973 | |
3763447 | Takahashi etal. | Oct 1973 | |
3820045 | Igarashi | Jun 1974 | |
3922623 | Bucherl | Nov 1975 | |
4451803 | Holdsworth et al. | May 1984 | |
4456895 | Landt et al. | Jun 1984 | |
4494095 | Noji et al. | Jan 1985 | |
4586009 | Ciszek | Apr 1986 | |
4672337 | Thibeault | Jun 1987 | |
4701726 | Holdsworth | Oct 1987 |
Number | Date | Country |
---|---|---|
83108 | Jul 1981 | JPX |
Entry |
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Dankai, Atilla; "Small-Size High-Stability VHF & UHF Duplex Filters for Mobile Radio Communication"; Budavox Telecommunication Review; Hungary; No. 4 (1978), pp. 1-6. |