Lewis Limited
3Patents
1Active
3Granted
34Portfolio score
Filing activity: Apr 28, 1987 → Mar 17, 2008 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4788992A | Ultrasonic strip cleaning apparatus | Performing Operations; Transporting | 50 | Expired |
| US5087379A | Ultrasonic vibrator tray processes | Performing Operations; Transporting | 23 | Expired |
| US8678352B2 | Wireline intervention system | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.