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Class Information
Number: 331/113.1
Name: Oscillators >

Sub-classes under this class:

Class Number Class Name Patents
331/103 Tube structure forms inductive part of resonant circuit 5
331/104 Transit time oscillator 4
331/105 With parasitic oscillation control or prevention means 46
331/106 With periodoic or repetitious amplitude varying means (e.g., tremolo) 7
331/107R Solid state active element oscillator 141
331/126 Gaseous space discharge device 4
331/132 Negative resistance or negative transconductance oscillator 40
331/135 Phase shift type 184
331/138 Bridge type 12
331/143 Relaxation oscillators 410
331/154 Electromechanical resonator 211
331/165 Shock excited resonant circuit 24
331/167 L-c type oscillators 415
331/172 With synchronizing, triggering or pulsing circuits 152
331/175 Frequency stabilization 511
331/177R With frequency adjusting means 918
331/182 Amplitude control or stabilization 89
331/184 Having discharged device or particular construction 10
331/185 With particular source of power or bias voltage 396
331/187 Miscellaneous oscillator structures 47
331/1R Automatic frequency stabilization using a phase or frequency sensing means 283
331/37 Beat frequency 71
331/44 With frequency calibration or testing 370
331/45 Polyphase output 281
331/46 Plural oscillators 329
331/57 Ring oscillators 1,356
331/58 Plural functions simultaneously 4
331/59 Convertible (e.g., oscillator to amplifier, etc.) 29
331/60 Single oscillator with plural output circuits 104
331/62 With oscillator circuit protective means 22
331/63 Protective of safety devices for personnel 3
331/64 With indicator, signal, or alarm 72
331/65 With device responsive to external physical condition 394
331/67 With electromagnetic or electrostatic shield 37
331/68 With outer casing or housing 216
331/70 With temperature modifier 54
331/71 Raw a.c. used as source of power or bias 5
331/72 Electron-coupled type 0
331/74 Combined with particular output coupling network 533
331/78 Electrical noise or random wave generator 311
331/79 Beam tube 37
331/86 With magnetically controlled space discharge device (e.g., magnetron) 41
331/92 Retarding field tube-type oscillators (e.g., barkhausen kurz) 0
331/94.1 Molecular or particle resonant type (e.g., maser) 199
331/95 Butterfly resonator 0
331/96 With distributed parameter resonator 462
331/DIG.2 Phase locked loop having lock indicating or detecting means 471
331/DIG.3 Logic gate active element oscillator 116

Patents under this class:

Patent Number Title Of Patent Date Issued

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