Ion Systems, Inc.
41Patents
2Active
41Granted
40Portfolio score
Filing activity: Mar 6, 1980 → Mar 16, 2008 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6850403B1 | Air ionizer and method | Electricity | 85 | Expired |
| US5055963A | Self-balancing bipolar air ionizer | Electricity | 82 | Expired |
| US6118645A | Self-balancing bipolar air ionizer | Electricity | 78 | Expired |
| US4809127A | Self-regulating air ionizing apparatus | Electricity | 72 | Expired |
| US6389437B2 | System for converting scrolling display to non-scrolling columnar display | Physics | 62 | Expired |
| US4901194A | Method and apparatus for regulating air ionization | Electricity | 58 | Expired |
| US4951172A | Method and apparatus for regulating air ionization | Electricity | 48 | Expired |
| US4542434A | Method and apparatus for sequenced bipolar air ionization | Human Necessities | 44 | Expired |
| US5930105A | Method and apparatus for air ionization | Electricity | 43 | Expired |
| US6693788B1 | Air ionizer with static balance control | Electricity | 39 | Expired |
| US6807044B1 | Corona discharge apparatus and method of manufacture | Electricity | 38 | Expired |
| US5447763A | Silicon ion emitter electrodes | Emerging Cross-Sectional Technologies | 34 | Expired |
| US6088211A | Safety circuitry for ion generator | Electricity | 27 | Expired |
| US6330146A | Piezoelectric/electrostrictive device and method of manufacturing same | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4827371A | Method and apparatus for ionizing gas with point of use ion flow delivery | Electricity | 24 | Expired |
| US6563110B1 | In-line gas ionizer and method | Electricity | 23 | Expired |
| US5768087A | Method and apparatus for automatically cleaning ionizing electrodes | Electricity | 23 | Expired |
| US6002573A | Self-balancing shielded bipolar ionizer | Electricity | 21 | Expired |
| US8009405B2 | Low maintenance AC gas flow driven static neutralizer and method | Electricity | 20 | Active |
| US6259591A | Apparatus and method for monitoring of air ionization | Electricity | 19 | Expired |
| US8063336B2 | Multi-frequency static neutralization | Electricity | 16 | Active |
| US6791815B1 | Dynamic air ionizer and method | Electricity | 15 | Expired |
| US7057130B2 | Ion generation method and apparatus | Electricity | 15 | Expired |
| US6130815A | Apparatus and method for monitoring of air ionization | Electricity | 13 | Expired |
| US5650203A | Silicon ion emitter electrodes | Emerging Cross-Sectional Technologies | 13 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.