Number | Date | Country | Kind |
---|---|---|---|
1-83704 | Mar 1989 | JPX |
Number | Date | Country |
---|---|---|
2949991 | Jul 1981 | DEX |
8523024 | Mar 1987 | DEX |
3729731 | Apr 1988 | DEX |
3805268 | Sep 1988 | DEX |
61-69299 | Apr 1986 | JPX |
61-69300 | Apr 1986 | JPX |
Entry |
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IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, vol. 36, No. 6, Nov. 1989; "Apodization of Multilayer Bulk Wave Transducers", E. Akcakaya et al; 1989. |