Number | Date | Country | Kind |
---|---|---|---|
4031756 | Oct 1990 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3879347 | Serini et al. | Apr 1975 | |
3879348 | Serini et al. | Apr 1975 | |
4277600 | Mark et al. | Jul 1981 | |
4301311 | Muller et al. | Nov 1981 | |
4446298 | Mark et al. | May 1984 | |
4520187 | Mark et al. | May 1985 | |
4554309 | Mark et al. | Nov 1985 | |
4576996 | Mark et al. | Mar 1986 | |
4663434 | Mark et al. | May 1987 | |
4675458 | Riemann et al. | Jun 1987 | |
4982014 | Freitag et al. | Jan 1991 |
Number | Date | Country |
---|---|---|
8000348 | Mar 1980 | WOX |
Entry |
---|
Patent Abstracts of Japan No. 1-157926, vol. 13, No. 419, Sep. 18, 1989. |