US PATENT SUBCLASS 136 / 254
.~.~ Photoemissive, capacitive, magnetic, or ferroelectric

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

243  DF  PHOTOELECTRIC {2}
252  DF  .~ Cells {12}
254.~.~ Photoemissive, capacitive, magnetic, or ferroelectric

DEFINITION

Classification: 136/254

Photoemissive, capacitive, magnetic, or ferroelectric:

(under subclass 252) Device in which the light (a) causes emission of electrons from a cathode, (b) alters the capacitance, (c) acts in a magnetic field, or (d) utilizes the ferroelectric property of said device.