Frederick William Johnson
2Patents
0Active
2Granted
24Portfolio score
Filing activity: Feb 26, 1979 → Sep 18, 1991
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5154452A | Tubular connection with S-thread form for clamping center seal | Fixed Constructions | 35 | Expired |
| US4274762A | Prestressed rock truss | Fixed Constructions | 17 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.