Number | Date | Country | Kind |
---|---|---|---|
50-145332 | Dec 1975 | JP | |
51-12640 | Feb 1976 | JP | |
51-12642 | Feb 1976 | JP | |
51-70133 | Jun 1976 | JP | |
51-70134 | Jun 1976 | JP |
Number | Name | Date | Kind |
---|---|---|---|
2950995 | Place et al. | Aug 1960 | |
3598763 | Matsuoka et al. | Aug 1971 | |
3663458 | Masuyama et al. | May 1972 | |
3764566 | Matsuoka et al. | Oct 1973 | |
3903226 | Iga et al. | Sep 1975 | |
3962144 | Matsuura et al. | Jun 1976 | |
4041436 | Kouchich et al. | Aug 1977 | |
4046847 | Kresge | Sep 1977 |
Entry |
---|
Leiser, Importance of Lead in Glass, The Glass Industry, Oct. 1963, pp. 574-576 and 594. |