Number | Date | Country | Kind |
---|---|---|---|
8630155 | Dec 1986 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
3825741 | Mortan et al. | Jul 1974 | |
3923381 | Winston | Dec 1975 | |
4114592 | Winston | Sep 1978 | |
4299447 | Soltan et al. | Nov 1981 | |
4330813 | Deutsch | May 1982 | |
4735495 | Henkes | Apr 1988 |
Number | Date | Country |
---|---|---|
0186179 | Jul 1986 | EPX |
0155829 | Sep 1984 | JPX |
Entry |
---|
Hecht et al, Optics, Addison-Wesley, Massachusetts, 1974, p. 81. |