Number | Name | Date | Kind |
---|---|---|---|
4160271 | Grayson et al. | Jul 1979 | |
4326193 | Markley et al. | Apr 1982 | |
4327809 | Fenstermaker | May 1982 | |
4336569 | Tsuda et al. | Jun 1982 | |
4479798 | Romano et al. | Oct 1984 | |
4841412 | Heys, Jr. et al. | Jun 1989 | |
4920799 | Low | May 1990 | |
4992903 | Chen | Feb 1991 |
Entry |
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Intermark.RTM. Corporation advertisement Jul. 1989. |