US PATENT SUBCLASS 330 / 59
HAVING LIGHT-CONTROLLED OR ACTIVATED DEVICE (I.E., NOT LIGHT SIGNAL)


Current as of: June, 1999
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330 /   HD   AMPLIFIERS

59HAVING LIGHT-CONTROLLED OR ACTIVATED DEVICE (I.E., NOT LIGHT SIGNAL)


DEFINITION

Classification: 330/59

(under the class definition) Subject matter including means controlled by light or activated by light which may be involved in the amplifying device, per se, used as a control means, or which may be included in any other part of the amplifier.

(1) Note. Subject matter wherein light controlled or activated means is not a part of the amplifier but is combined therewith (as for example, as a photo-electric cell with light means therein feeding a signal current to a vacuum tube amplifier) is not classified in this class.

SEE OR SEARCH THIS CLASS, SUBCLASS:

308, for amplifiers having atomic particle or radiant energy impinging on a semiconductor amplifying device. See the search notes thereunder.

SEE OR SEARCH CLASS

250, Radiant Energy,

200+, appropriate subclasses for photocell circuits. See also the notes and search notes under subclass 200.