Circa Enterprises, Inc.
3Patents
1Active
3Granted
31Portfolio score
Filing activity: Dec 22, 1995 → Jan 16, 2009 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6237410A | Method for controlling the speed of a pump based on measurement of the fluid depth in a well | Fixed Constructions | 14 | Expired |
| US8320094B2 | Surge protection module | Electricity | 1 | Active |
| US5847916A | Protector | Electricity | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.