Measuring, Testing, Or Sensing Electricity, Per Se Patents (Class 324/76.11)
- Frequency comparison, (e.g., heterodyne, etc.) (Class 324/76.41)
- Tuned mechanical resonator (e.g., reed, piezocrystal, etc.) (Class 324/76.49)
- By tuning (e.g., to resonance,etc.) (Class 324/76.51)
- By phase comparison (Class 324/76.52)
- Having inductive sensing (Class 324/76.75)
- With space discharge device (Class 324/76.76)
Phase comparison (e.g., between cyclic pulse voltage and sinusoidal current, etc.) (Class 324/76.77)
- Quadrature sensing (Class 324/76.78)
- Feedback control, electrical (Class 324/76.79)
- Feedback control, mechanical (Class 324/76.81)
- Digital output (Class 324/76.82)
- Analog output (Class 324/76.83)
- With waveguide (e.g., coaxial cable) (Class 324/84)
- With frequency conversion (Class 324/85)
- Polyphase (e.g., phase angle, phase rotation or sequence) (Class 324/86)
- With nonlinear device (e.g., saturable reactor, rectifier), discharge device (e.g., gas tube) or lamp (Class 324/87)
- Electrodynamometer instrument (Class 324/90)
- Synchroscope type (Class 324/91)