429 / | HD | CHEMISTRY: ELECTRICAL CURRENT PRODUCING APPARATUS, PRODUCT, AND PROCESS |
122 | DF | CURRENT PRODUCING CELL, ELEMENTS, SUBCOMBINATIONS AND COMPOSITIONS FOR USE THEREWITH AND ADJUNCTS {16} |
209 | DF | .~ Electrode {7} |
233 | DF | .~.~ Grid or holder for active material {6} |
241 | DF | .~.~.~ Open mesh or perforated plate {2} |
242 | .~.~.~.~ Expanded metal |