Number | Date | Country | Kind |
---|---|---|---|
54-132537 | Oct 1979 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
2548564 | Sprague et al. | Apr 1947 | |
3068215 | Laakso et al. | Dec 1962 | |
3399995 | Winchell | Sep 1968 | |
3816129 | Fitzgerald | Jun 1974 | |
3925083 | Fitzgerald | Dec 1975 | |
4013696 | Babbit et al. | Mar 1977 |
Entry |
---|
Merck Index, 9th Edition, p. 1208 (1976). |