US PATENT SUBCLASS 340 / 657
.~.~ Electrical characteristic

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.~.~ Electrical characteristic {4}
658  DF  .~.~.~> Phase or frequency
659  DF  .~.~.~> Pulse or surge
660  DF  .~.~.~> Voltage {3}
664  DF  .~.~.~> Current

DEFINITION

Classification: 340/657

Electrical characteristic:

(under subclass 540) Subject matter where the condition monitored is a characteristic of electricity, per se, (i.e., power delivered, electric charge), rather than of a particular circuit.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems,

125+, for switching systems that are responsive to electrical conditions.

324, Electricity: Measuring and Testing,

76.11+, for measuring, testing, or sensing electricity, per se.

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems, 1+, for miscellaneous discriminating circuits.

361, Electricity: Electrical Systems and Devices,

182+, for relay systems that are electrical characteristic responsive.