| 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} |
| 218.1 | DF | .~.~ Chemically specified inorganic electrochemically active material containing {16} |
| 221 | | .~.~.~ Iron component is active material |