US PATENT SUBCLASS 320 / FOR 169
.~.~.~.~ Pressure-responsive type of impedance (320/70)

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 160  DF  .~ Generation systems for battery charging (320/61) {4}
FOR 163  DF  .~.~ Generator field-winding circuit control (320/64) {3}
FOR 167  DF  .~.~.~ Field-winding circuit impedance (320/68) {2}
FOR 169.~.~.~.~ Pressure-responsive type of impedance (320/70)

DEFINITION

Classification: 320/FOR.169

Foreign art collection in which the impedance is of the type in which the resistance to the flow of 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.