Electricity: Motor Control Systems Patents (Class 388)
- Field control, or field and armature control, by digital or combined analog and digital circuitry (Class 388/801)
- Field control, or field and armature control, by analog (only) circuitry (Class 388/803)
- Armature control by digital or combined analog and digital circuitry (Class 388/809)
- Analog armature control (Class 388/816)
Cross-Reference Art Collections
- Bridge circuit (Class 388/907.2)
- Computer or microprocessor (Class 388/907.5)
- Frequency to voltage converter (Class 388/908)
- Monitoring means (Class 388/909)
- Operational/differential amplifier (Class 388/910)
- Phase locked loop (Class 388/911)
- Pulse or frequency counter (Class 388/912)
- Saturable reactor, space discharge device, or magnetic amplifier (Class 388/913)
- Sawtooth or ramp waveform generator (Class 388/915)
- Threshold circuit (Class 388/916)
- Thyristor or SCR (Class 388/917)
- Timer or time delay means (Class 388/921)
- Tuned or resonant circuit (Class 388/922)
