Frank E. Marshall
1Patents
0Active
1Granted
22Portfolio score
Filing activity: Jul 13, 1987 → Jul 13, 1987
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4768775A | Combination rowing machine and chest exerciser | Emerging Cross-Sectional Technologies | 34 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.