US PATENT SUBCLASS 455 / 118
.~ Frequency conversion
Current as of: June, 1999
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DEFINITION
Classification: 455/118
Frequency conversion:
(under subclass 91) Subject matter where a signal is converted from a first frequency to a second frequency.
SEE OR SEARCH CLASS
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,
113+, for miscellaneous frequency conversion or control.
331, Oscillators,
51, and 53 for plural oscillator frequency multipliers and dividers.
363, Electric Power Conversion Systems, 157+, for electric power frequency conversion.
