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Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
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Class 332 | MODULATORS |
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100 | FREQUENCY SHIFT KEYING MODULATOR OR MINIMUM SHIFT KEYING MODULATOR |
101 | Including logic element (e.g., logic gate or flip-flop) |
102 | Including discrete semiconductor device |
103 | PHASE SHIFT KEYING MODULATOR OR QUADRATURE AMPLITUDE MODULATOR |
104 | Including logic element (e.g., logic gate or flip-flop) |
105 | Including discrete semiconductor device |
106 | PULSE OR INTERRUPTED CONTINUOUS WAVE MODULATOR |
107 | Including stabilization or alternatively distortion, noise or other interference prevention, reduction or compensation |
108 | Plural modulation |
109 | Pulse width modulator |
110 | Including discrete semiconductor device having three or more electrodes |
111 | Including electron discharge device |
112 | Pulse position, frequency, phase, or spacing modulator |
113 | Including discrete semiconductor device having three or more electrodes |
114 | Including electron discharge device |
115 | Pulse amplitude modulator |
117 | FREQUENCY MODULATOR |
118 | Including measuring or indicating |
119 | Plural modulation |
123 | Including stabilization or alternatively distortion, noise or other interference prevention, reduction, or compensation |
124 | Nonlinearity reduction or compensation |
125 | Automatic amplitude stabilization or control |
126 | Automatic frequency stabilization or control |
129 | Including microwave or distributed parameter structure |
135 | Including discrete semiconductor device |
137 | Including electron discharge device |
144 | PHASE MODULATOR |
145 | Including amplitude modulator |
146 | Including discrete semiconductor device |
147 | Including electron discharge device |
149 | AMPLITUDE MODULATOR |
150 | Including measuring or indicating |
151 | Plural modulation |
155 | Percent modulation control or automatic amplitude control of carrier or modulating signal |
156 | Overmodulation prevention |
157 | Average carrier amplitude controlled by modulating signal |
158 | Carrier output suppressed during absence of modulating signal |
159 | Including stabilization or alternatively distortion, noise or other interference prevention, reduction or compensation |
160 | Reduction or compensation of nonlinearity in modulation characteristic |
161 | Reduction of carrier phase or frequency variations or modulation |
162 | Using feedback to reduce distortion, noise or other interference |
163 | Including microwave or distributed parameter structure |
167 | Suppressed carrier double sideband type |
170 | Single or vestigial sideband type |
172 | Modulating signal applied to a bridge circuit |
173 | Magnetic field varied by modulating signal |
174 | Resistive or dissipative device controlled by modulating signal (e.g., loss modulator) |
175 | Variable reactance controlled by modulating signal |
176 | Nonlinear device controlled by modulating signal |
178 | Including discrete semiconductor device |
179 | Including electron discharge device |
183 | MODULATION CONVERTER HAVING PRE-MODULATED INPUT (E.G., FM TO AM) |
185 | MISCELLANEOUS |
FOREIGN ART COLLECTIONS | ||
FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
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