US PATENT SUBCLASS 372 / 21
.~ Nonlinear device

Current as of: June, 1999
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372 /   HD   COHERENT LIGHT GENERATORS

9  DF  PARTICULAR BEAM CONTROL DEVICE {10}
21.~ Nonlinear device {1}
22  DF  .~.~> Frequency multiplying (e.g., harmonic generator)

DEFINITION

Classification: 372/21

Nonlinear device:

(under subclass 9) Subject matter including an optical device which has an output that does not rise or fall in direct proportion to the input.