US PATENT SUBCLASS 340 / 661
.~.~.~.~ Comparison

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


340 /   HD   COMMUNICATIONS: ELECTRICAL

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
540  DF  .~ Specific condition {18}
657  DF  .~.~ Electrical characteristic {4}
660  DF  .~.~.~ Voltage {3}
661.~.~.~.~ Comparison

DEFINITION

Classification: 340/661

Comparison:

(under subclass 660) Subject matter where the voltage is monitored by comparison with another voltage or a reference.

SEE OR SEARCH CLASS

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

50+, for miscellaneous specific amplitude discriminating circuits.