Basic Measuring Instruments
22Patents
0Active
22Granted
34Portfolio score
Filing activity: May 28, 1985 → May 23, 1996
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5089979A | Apparatus for digital calibration of detachable transducers | Electricity | 121 | Expired |
| US5212441A | Harmonic-adjusted power factor meter | Physics | 91 | Expired |
| US5302890A | Harmonic-adjusted power factor meter | Physics | 76 | Expired |
| US5014229A | Method and apparatus for calibrating transducer/amplifier systems | Physics | 76 | Expired |
| US5347464A | High-pass filter for enhancing the resolution of AC power line harmonic measurements | Physics | 70 | Expired |
| US5298854A | Harmonic-adjusted watt-hour meter | Physics | 68 | Expired |
| US5300924A | Harmonic measuring instrument for AC power systems with a time-based threshold means | Physics | 64 | Expired |
| US5298856A | Harmonic-adjusted power factor meter | Physics | 63 | Expired |
| US5298855A | Harmonic-adjusted power factor meter | Physics | 59 | Expired |
| US5307009A | Harmonic-adjusted watt-hour meter | Physics | 59 | Expired |
| US5298888A | Harmonic measuring instrument for AC power systems with latched indicator means | Physics | 58 | Expired |
| US5298885A | Harmonic measuring instrument for AC power systems with poly-phase threshold means | Physics | 57 | Expired |
| US5298859A | Harmonic-adjusted watt-hour meter | Physics | 55 | Expired |
| US4694402A | Waveform disturbance detection apparatus and method | Physics | 55 | Expired |
| US4642563A | Power line impulse measurement system | Physics | 22 | Expired |
| US5742153A | Coasting power supply for AC power system waveform measuring instrument | Physics | 22 | Expired |
| US5808902A | Power quality transducer for use with supervisory control systems | Electricity | 20 | Expired |
| US5471401A | Waveform library for characterizing an AC power line spectrum | Physics | 18 | Expired |
| US5408523A | Electronic remote data recorder with facsimile output for utility AC power systems | Electricity | 16 | Expired |
| US5270637A | Impulse direction detector for ac power systems | Physics | 6 | Expired |
| US5184066A | Method and apparatus for disabling all operations of an electronic instrument except for an automatic test procedure | Physics | 5 | Expired |
| US5481468A | Method and apparatus for storing an increasing number of sequential real-time samples in a fixed amount of memory | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.