US PATENT SUBCLASS 334 / 39
COMBINED
Current as of: June, 1999
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DEFINITION
Classification: 334/39
(under the class definition) Tuning devices in which the tuner is combined with structure other than tuner structure or some change in tuning structure and/or design which improves the operation of the tuner and which is not otherwise classified.
SEE OR SEARCH CLASS
84, Music, appropriate subclasses for musical devices that may use tuned circuits, especially
671, 746 for electrical tone generation by the use of tuned sound generators or resonators. Also subclasses 423+ for keyboard operated musical devices, the keys serving to select the tuned circuit which is to be placed into circuit with an electrical tone generator.
219, Electric Heating,
750, for microwave heating with tuned circuits. 322, Electricity: Single Generator Systems,
78, for generator control systems which have plural impedances in the excitation circuit, the impedances forming a tuned circuit.
324, Electricity: Measuring and Testing,
600+, for tuners combined with means to measure the impedance, admittance and related quantities of the tuner.
329, Demodulators, appropriate subclasses for demodulators with tuning or indicating structure.
331, Oscillators, appropriate subclass for oscillators having a tuned circuit, especially
177+, for oscillators with frequency adjusting means.
336, Inductor Devices,
105+, for inductors combined with some other structure such as, for example, a connector.
343, Communications: Radio Wave Antennas,
350+, 850+ and 866+ for tuners combined with detailed antenna structure.
348, Television, 731, for tuners combined with television receiver circuitry.
361, Electricity: Electrical Systems and Devices,
113, for a safety and protective system or device combined with a tuned circuit; subclasses 268+ for a transformer or inductor combined with a switch, capacitor or lock; and subclasses 275.1+ for a capacitor combined with some other structure such as, for example, an electrical socket.
370, Multiplex Communications, appropriate subclasses for multiplex systems which are tunable by an inductor or capacitor.
373, Industrial Electric Heating Furnaces,
138+, for induction type electrical furnaces which may use a tuned circuit.
455, Telecommunications, appropriate subclasses.
