Hänvisningar finns i följande patent|
| US4190832 | 18 apr 1978 | 26 feb 1980 | | Polarized windshield indicia reflection display system | | US4268985 | 5 maj 1980 | 26 maj 1981 | | Desk name plate | | US4403216 | 22 apr 1981 | 6 sep 1983 | Nintendo Co., Ltd. | Display | | US4561723 | 27 apr 1983 | 31 dec 1985 | Tomy Kogyo Co., Inc. | Electronic stereoscopic viewing device | | US4568080 | 2 maj 1983 | 4 feb 1986 | Nintendo Co., Ltd. | Display apparatus | | US4642627 | 13 mar 1984 | 10 feb 1987 | General Electric Company | Illuminated compact control surface | | US4666299 | 2 maj 1985 | 19 maj 1987 | Tokyo Kogaku Kikai Kabushiki Kaisha | Inclination measuring apparatus having a prism with associated liquid container |
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