Number | Date | Country | Kind |
---|---|---|---|
88202147.0 | Sep 1988 | EPX |
Number | Name | Date | Kind |
---|---|---|---|
3519864 | Gungle et al. | Jul 1970 | |
4004171 | Heuvelmans | Jan 1977 | |
4891542 | Mellor et al. | Jan 1990 |
Number | Date | Country |
---|---|---|
6411552 | Nov 1965 | NLX |
Entry |
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Patent Abstracts of Japan, vol. 3, No. 12, Appln. No. 53-47909, Kokai No. 53-135187, 11/78. |