| 429 / | HD | CHEMISTRY: ELECTRICAL CURRENT PRODUCING APPARATUS, PRODUCT, AND PROCESS |
| 12 | DF | FUEL CELL, SUBCOMBINATION THEREOF OR METHODS OF OPERATING {10} |
| 40 | DF | .~ Catalytic electrode structure or composition {3} |
| 44 | DF | .~.~ Having an inorganic matrix, substrate or support {1} |
| 45 | | .~.~.~ Of sintered particles |