John D. O'Brien
1Patents
0Active
1Granted
19Portfolio score
Filing activity: Jul 11, 1985 → Jul 11, 1985
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4653255A | Line reel mower | Human Necessities | 2 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.