Number | Date | Country | Kind |
---|---|---|---|
87 03838 | Mar 1987 | FRX |
Number | Name | Date | Kind |
---|---|---|---|
3393383 | Chiron et al. | Jul 1968 | |
3659231 | De Vries | Apr 1972 | |
3663899 | Dieulesaint et al. | May 1972 | |
4044321 | Vasile | Aug 1977 | |
4327340 | Coldren | Apr 1982 | |
4460995 | Devries | Jul 1984 | |
4468642 | Hikita | Aug 1984 | |
4639697 | Yarranton et al. | Jan 1987 | |
4661923 | Grudkowski et al. | Apr 1987 | |
4730172 | Bengeult | Mar 1988 | |
4857870 | Gautier et al. | Aug 1989 |
Number | Date | Country |
---|---|---|
2346899 | Oct 1977 | FRX |
2591049 | Jun 1987 | FRX |
8703756 | Jun 1987 | FRX |
Entry |
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Telecommunications & Radio Engineering, vol. 34/35, No. 5, May 1980, pp. 62-67, Scripta Publishing Co., Silver Spring, Md., U.S.; E. E. Znamenskiy et al.: "Features of the Construction of Narrowband Filters For Acoustic Surface Waves". |