US PATENT SUBCLASS 320 / FOR 151
.~.~.~ Pressure-responsive type of impedance (320/52)

Current as of: June, 1999
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320 /   HD   ELECTRICITY: BATTERY OR CAPACITOR CHARGING OR DISCHARGING

FOR 101  DF  BATTERY CHARGING AND/OR DISCHARGING (320/2) {15}
FOR 148  DF  .~ Battery circuit control (320/49) {4}
FOR 150  DF  .~.~ By impedance in charging or discharging circuit (320/51) {1}
FOR 151.~.~.~ Pressure-responsive type of impedance (320/52)

DEFINITION

Classification: 320/FOR.151

Foreign art collection in which the impedance is of the type in which the impedance to the flow of electric current therethrough varies with change in physical pressure applied thereto, and in which means are provided for applying a variable physical pressure to the impedance.