349 / | HD | LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS |
56 | DF | PARTICULAR STRUCTURE {7} |
84 | DF | .~ Having significant detail of cell structure only {17} |
104 | DF | .~.~ Filter {3} |
106 | DF | .~.~.~ Color filter {3} |
109 | .~.~.~.~ With unequal areas for different colors or with fractional shift between one line of colors and the next |