The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.
Number | Name | Date | Kind |
---|---|---|---|
2875355 | Petermann | Feb 1959 | |
3940637 | Ohigashi et al. | Feb 1976 | |
3971250 | Taylor | Jul 1976 | |
4071785 | Yoshida et al. | Jan 1978 | |
4184095 | Stacchiotti et al. | Jan 1980 | |
4218631 | Yamaguchi | Aug 1980 | |
4325060 | Purtell | Apr 1982 | |
4339683 | Scott et al. | Jul 1982 | |
4356421 | Shimizu et al. | Oct 1982 |
Number | Date | Country |
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58391 | May 1977 | JPX |
Entry |
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PVF.sub.2 Transducers, by Shaw et al, Proceedings of IEEE Ultrasonics Symium, Boston, Ma., Nov. 5-7, 1980. |