US PATENT SUBCLASS 349 / 199
.~ Liquid crystal sensors (e.g., voltmeters, pressure sensors, temperature sensors)

Current as of: June, 1999
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349 /   HD   LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS

193  DF  LIQUID CRYSTAL OPTICAL ELEMENT {21}
199.~ Liquid crystal sensors (e.g., voltmeters, pressure sensors, temperature sensors)

DEFINITION

Classification: 349/199

Liquid crystal sensors (e.g., voltmeters, pressure sensors, temperature sensors):

(under subclass 193) Subject matter wherein the liquid crystal cell is used as a measuring device.

(1) Note. Excluded from this subclass are heat excited liquid crystals. For such excluded subject matter, see SEARCH THIS CLASS, SUBCLASS below.

(2) Note. Excluded from this subclass are liquid crystal

touch pads. For such excluded subject matter, see SEARCH CLASS below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

20, for heat excited liquid crystals.

SEE OR SEARCH CLASS

345, Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems, 104, and 173+ for liquid crystal touch pads.