US PATENT SUBCLASS 368 / 239
.~ Optical

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

Internet Version by PATENTEC © 1999      Terms of Use


368 /   HD   HOROLOGY: TIME MEASURING SYSTEMS OR DEVICES

223  DF  DISPLAYS OR DISPLAY DEVICE DETAILS {5}
239.~ Optical {3}
240  DF  .~.~> With circular pattern of light sources
241  DF  .~.~> With solid body light emitter (e.g., LED)
242  DF  .~.~> With liquid crystal display (i.e., LCD)

DEFINITION

Classification: 368/239

Optical:

(under subclass 223) Subject matter wherein the display includes means for projecting, reflecting, or transmitting, electrically produced visible radiation from or through time representative indicia.

SEE OR SEARCH THIS CLASS, SUBCLASS:

29+, for timepieces with calendar electro-optical indicators.

79, for chronological timepieces with mechanical or electromechanical driven optical display.

82+, for electronic timepieces with electro-optical display.

SEE OR SEARCH CLASS

40, Card, Picture, or Sign Exhibiting,

447+, for electro-optical changing exhibitors; and subclass 448 for liquid crystal changing exhibitors. 116, Signals and Indicators,

200+, especially subclasses 202 and 250 for indicators with visual light signals.

252, Compositions,

299.01+, for liquid crystal compositions, per se.

257, Active Solid-State Devices (e.g., Transistors, Solid-State Diodes),

13, 79-103, and 918 for incoherent light emitting injection luminescent devices, and subclasses 80-85 for semiconductor light emitting sources combined with semiconductor light responsive devices.

313, Electric Lamp and Discharge Devices,

483+, for solid material which produces radiant energy upon electrical excitation.

340, Communications: Electrical,

815.4+, for electrical visual-signalling means with indicator means.

345, Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems, 1+, for visual display systems with selective electrical control.

349, Liquid Crystal Cells, Elements and Systems, appropriate subclasses and especially

142, for optical systems and elements utilizing liquid crystal materials.

362, Illumination,

23+, for artificial-light means for dials.