Number | Name | Date | Kind |
---|---|---|---|
2432864 | Dimsdale et al. | Dec 1947 | |
3615490 | Gaffin | Oct 1971 | |
3620749 | Haist | Nov 1971 | |
4013470 | Landon, Jr. | Mar 1977 | |
4043817 | Okutsu et al. | Aug 1977 | |
4163669 | Kanada et al. | Aug 1979 | |
4732846 | Aono et al. | Mar 1988 | |
4772545 | Nishiyama et al. | Sep 1988 | |
4912026 | Miyoshi et al. | Mar 1990 | |
4923784 | Harder et al. | May 1990 |
Number | Date | Country |
---|---|---|
3624606 | Jul 1986 | DEX |
3-37641 | Feb 1991 | JPX |
Entry |
---|
Derwent Abstract, Feb. 19, 1991, JP 03037641, p. 10. |
ACS Abstract, JP 03037641, p. 2. |