Number | Date | Country | Kind |
---|---|---|---|
4799/73 | Apr 1973 | CH |
Number | Name | Date | Kind |
---|---|---|---|
3795436 | Boller | Mar 1974 | |
3796479 | Helfrich | Mar 1974 |
Number | Date | Country |
---|---|---|
2,234,522 | Jan 1973 | DT |
2,306,739 | Aug 1973 | DT |
2,024,269 | Dec 1971 | DT |
Entry |
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Article of Boller et al. "Proceedings of IEEE," Aug. 1972, pp. 1002-1003. |
Usoltseva et al., Chemical Characteristics, Structure & Properties of Liquid Crystals, 9/63. |