US PATENT SUBCLASS 136 / 253
.~.~ Radioactive, ionic, or thermo photo

Current as of: June, 1999
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136 /   HD   BATTERIES: THERMOELECTRIC AND PHOTOELECTRIC

243  DF  PHOTOELECTRIC {2}
252  DF  .~ Cells {12}
253.~.~ Radioactive, ionic, or thermo photo

DEFINITION

Classification: 136/253

Radioactive, ionic, or thermo photo:

(under subclass 252) Photocell in which the light which generates the photovoltaic effect is produced by radio activity, ions, or heat (e.g., scintillation or incandescence, etc.).