John R. Coffey
1Patents
0Active
1Granted
21Portfolio score
Filing activity: Sep 15, 1976 → Sep 15, 1976
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4058464A | Helically wound expandable filter | Performing Operations; Transporting | 10 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.