| Class Number |
Class Name |
No. of Patents |
| 332/149 |
Amplitude modulator |
82 |
| 332/178 |
Including discrete semiconductor device |
64 |
| 332/179 |
Including electron discharge device |
2 |
| 332/182 |
Grid circuit modulation |
6 |
| 332/181 |
Plate circuit modulation |
4 |
| 332/180 |
Push-pull circuit |
2 |
| 332/150 |
Including measuring or indicating |
13 |
| 332/163 |
Including microwave or distributed parameter structure |
13 |
| 332/164 |
With discrete semiconductor device |
21 |
| 332/165 |
With electron discharge device |
1 |
| 332/166 |
Magnetron type |
1 |
| 332/159 |
Including stabilization or alternatively distortion, noise or other interference prevention, reduction or compensation |
68 |
| 332/161 |
Reduction of carrier phase or frequency variations or modulation |
11 |
| 332/160 |
Reduction or compensation of nonlinearity in modulation characteristic |
30 |
| 332/162 |
Using feedback to reduce distortion, noise or other interference |
53 |
| 332/173 |
Magnetic field varied by modulating signal |
3 |
| 332/172 |
Modulating signal applied to a bridge circuit |
12 |
| 332/176 |
Nonlinear device controlled by modulating signal |
4 |
| 332/177 |
Nonlinear discrete semiconductor device |
10 |
| 332/155 |
Percent modulation control or automatic amplitude control of carrier or modulating signal |
17 |
| 332/157 |
Average carrier amplitude controlled by modulating signal |
7 |
| 332/158 |
Carrier output suppressed during absence of modulating signal |
3 |
| 332/156 |
Overmodulation prevention |
5 |
| 332/151 |
Plural modulation |
87 |
| 332/152 |
Including discrete semiconductor device |
38 |
| 332/153 |
Including electron discharge device |
2 |
| 332/154 |
Push-pull circuit |
2 |
| 332/174 |
Resistive or dissipative device controlled by modulating signal (e.g., loss modulator) |
7 |
| 332/170 |
Single or vestigial sideband type |
79 |
| 332/171 |
Including electron discharge device |
0 |
| 332/167 |
Suppressed carrier double sideband type |
24 |
| 332/168 |
Including discrete semiconductor device |
15 |
| 332/169 |
Including electron discharge device |
3 |
| 332/175 |
Variable reactance controlled by modulating signal |
5 |
| 332/117 |
Frequency modulator |
84 |
| 332/135 |
Including discrete semiconductor device |
42 |
| 332/136 |
With varactor |
61 |
| 332/137 |
Including electron discharge device |
0 |
| 332/138 |
Particular oscillator circuit |
4 |
| 332/139 |
Crystal oscillator type |
2 |
| 332/140 |
With separate modulator tube (e.g., reactance tube) |
0 |
| 332/141 |
L-c oscillator type |
11 |
| 332/142 |
With separate modulator tube (e.g., reactance tube) |
0 |
| 332/143 |
Plural modulator tubes |
0 |
| 332/118 |
Including measuring or indicating |
19 |
| 332/129 |
Including microwave or distributed parameter structure |
7 |
| 332/130 |
With discrete semiconductor device |
17 |
| 332/131 |
With electron discharge device |
1 |
| 332/133 |
Klystron type |
2 |
| 332/132 |
Magnetron type |
2 |
| 332/134 |
Travelling wave type |
3 |
| 332/123 |
Including stabilization or alternatively distortion, noise or other interference prevention, reduction, or compensation |
94 |
| 332/125 |
Automatic amplitude stabilization or control |
19 |
| 332/126 |
Automatic frequency stabilization or control |
19 |
| 332/127 |
Phase or frequency locked loop |
215 |
| 332/128 |
Modulating signal applied to plural elements of the loop |
100 |
| 332/124 |
Nonlinearity reduction or compensation |
52 |
| 332/119 |
Plural modulation |
70 |
| 332/120 |
Including amplitude modulation |
32 |
| 332/121 |
Including electron discharge device |
0 |
| 332/122 |
Including electron discharge device |
0 |
| 332/100 |
Frequency shift keying modulator or minimum shift keying modulator |
162 |
| 332/102 |
Including discrete semiconductor device |
30 |
| 332/101 |
Including logic element (e.g., logic gate or flip-flop) |
66 |
| 332/185 |
Miscellaneous |
13 |
| 332/183 |
Modulation converter having pre-modulated input (e.g., fm to am) |
20 |
| 332/184 |
Between diverse pulse modulation types |
3 |
| 332/144 |
Phase modulator |
113 |
| 332/145 |
Including amplitude modulator |
81 |
| 332/146 |
Including discrete semiconductor device |
32 |
| 332/147 |
Including electron discharge device |
0 |
| 332/148 |
Push-pull circuit |
1 |
| 332/103 |
Phase shift keying modulator or quadrature amplitude modulator |
499 |
| 332/105 |
Including discrete semiconductor device |
64 |
| 332/104 |
Including logic element (e.g., logic gate or flip-flop) |
98 |
| 332/106 |
Pulse or interrupted continuous wave modulator |
79 |
| 332/107 |
Including stabilization or alternatively distortion, noise or other interference prevention, reduction or compensation |
67 |
| 332/108 |
Plural modulation |
41 |
| 332/115 |
Pulse amplitude modulator |
37 |
| 332/116 |
Including discrete semiconductor device having three or more electrodes |
22 |
| 332/112 |
Pulse position, frequency, phase, or spacing modulator |
79 |
| 332/113 |
Including discrete semiconductor device having three or more electrodes |
15 |
| 332/114 |
Including electron discharge device |
1 |
| 332/109 |
Pulse width modulator |
186 |
| 332/110 |
Including discrete semiconductor device having three or more electrodes |
40 |
| 332/111 |
Including electron discharge device |
6 |
