Number | Date | Country | Kind |
---|---|---|---|
6-208363 | Sep 1994 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4341592 | Shortes et al. | Jul 1982 | |
5007981 | Kawasaki et al. | Apr 1991 | |
5135608 | Okutani | Aug 1992 | |
5171393 | Moffat | Dec 1992 | |
5198634 | Mattson et al. | Mar 1993 |
Number | Date | Country |
---|---|---|
2-000315 | Jan 1990 | JPX |
Entry |
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The Hitachi Hyoron vol. 73, No. 9 (1991) pp. 37-42. |