Yoshikawa RF Systems Co., Ltd.
5Patents
3Active
5Granted
37Portfolio score
Filing activity: Nov 20, 1997 → Nov 27, 2007 · 3 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6118367A | Data carrier system | Electricity | 42 | Expired |
| US7142163B2 | Loop antenna device | Electricity | 19 | Expired |
| US8109445B2 | Data carrier and data carrier system | Physics | 2 | Active |
| US8497763B2 | Data carrier and data carrier system | Physics | 2 | Active |
| US7834753B2 | Data carrier and data carrier system | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.