Number | Name | Date | Kind |
---|---|---|---|
3065940 | Eckstein | Nov 1962 | |
4683800 | Snedeker | Aug 1987 | |
4986496 | Marentic et al. | Jan 1991 | |
5008140 | Schmertz | Apr 1991 | |
5106439 | Wellings et al. | Apr 1992 | |
5318251 | Bergh | Jun 1994 | |
5448687 | Hoogerhyde et al. | Sep 1995 | |
5556491 | Servanty et al. | Sep 1996 |
Entry |
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McGraw-Hill Encyclopedia of Science & Technology, vol. 18, 7th Edition, 1992, p. 10. |