Techno Ryowa Ltd.
5Patents
1Active
5Granted
30Portfolio score
Filing activity: Mar 21, 1991 → Aug 22, 2006 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5847917A | Air ionizing apparatus and method | Electricity | 40 | Expired |
| US5296018A | Method and apparatus for eliminating electric charges in a clean room | Electricity | 23 | Expired |
| US5249094A | Pulsed-DC ionizer | Electricity | 20 | Expired |
| US7397647B2 | Ionized gas current emission type dust-free ionizer | Electricity | 5 | Active |
| US7126807B2 | Ionized air flow discharge type non-dusting ionizer | Electricity | 4 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.