Number | Date | Country | Kind |
---|---|---|---|
2-108079 | Apr 1990 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3923370 | Mostrom | Dec 1975 | |
4482326 | Witt | Nov 1984 | |
4636866 | Hattori | Jan 1987 | |
4705371 | Beard | Nov 1987 | |
4805988 | Dones | Feb 1989 | |
4808978 | Vernay | Feb 1989 | |
4859030 | Rotier | Aug 1989 | |
4933755 | Dahl et al. | Jun 1990 | |
5034809 | Katoh | Jul 1991 |
Number | Date | Country |
---|---|---|
1103961 | Apr 1961 | DEX |
Entry |
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Nature, vol. 261, May 20, 1976, pp. 253-255. |