Number | Date | Country | Kind |
---|---|---|---|
60-39310[U] | Mar 1985 | JPX | |
60-211436 | Sep 1985 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3844650 | Nicholson | Oct 1974 | |
3895866 | De Quervain et al. | Jul 1975 |
Number | Date | Country |
---|---|---|
2623190 | Nov 1977 | DEX |
1401066 | Jul 1975 | GBX |
20711864 | Sep 1981 | GBX |
Entry |
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Abstract of New Technology from the Air Force Systems Command, N.T.I.S., Tech. Notes PB81-970247; "Liquid Crystal Diffraction Optics HUD". |