Number | Name | Date | Kind |
---|---|---|---|
2598608 | Salo et al. | Jun 1946 | |
2631942 | Highberger | Mar 1953 | |
2920000 | Hochstadt et al. | Jan 1960 | |
4404033 | Steffan | Sep 1983 | |
4485096 | Bell | Nov 1984 | |
4485097 | Bell | Nov 1984 | |
4539716 | Bell | Sep 1985 | |
4546500 | Bell | Oct 1985 | |
4604346 | Bell et al. | Sep 1987 | |
4835102 | Bell et al. | May 1989 | |
4837379 | Weinberg | Jun 1989 |
Number | Date | Country |
---|---|---|
285471 | Oct 1988 | EPX |
285474 | Oct 1988 | EPX |
Entry |
---|
Negroiu et al. CA vol. 113, 233700v p. 116, Jan. 30, 1989. |