Number | Name | Date | Kind |
---|---|---|---|
3952161 | Gilbert et al. | Apr 1976 | |
4192970 | Kahn | Mar 1980 | |
4377728 | Hilbert | Mar 1983 | |
4406922 | Parker et al. | Sep 1983 | |
4680795 | Eckland | Jul 1987 | |
4866779 | Kennedy et al. | Sep 1989 | |
5008939 | Bose et al. | Apr 1991 |
Number | Date | Country |
---|---|---|
0410663A2 | Jan 1991 | EPX |
0420448A2 | Apr 1991 | EPX |
Entry |
---|
European Search Report Ref. 90/4426/02, Application No. 92303247.8, dated Mar. 26, 1993. |