Number | Date | Country | Kind |
---|---|---|---|
91539 | Sep 1989 | ILX |
Number | Name | Date | Kind |
---|---|---|---|
2492353 | Brackett | Dec 1949 | |
3918813 | Rossiter | Nov 1975 | |
4318330 | Hausenblas | Mar 1982 |
Number | Date | Country |
---|---|---|
1151954 | Jul 1963 | DEX |
2926973 | Jan 1981 | DEX |
1378852 | Dec 1974 | GBX |
Entry |
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Walker, Periscope Optics and the High-Powered Laser, Optical Systems Engineering, vol. 193, 1979, pp. 116-120. |