David P. Marshall
7Patents
7h-index
8Co-inventors
56Inventor score
Filing activity: Mar 21, 1974 → Jun 2, 1997
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD379970S | Cover for electrical boxes | General | 40 | Expired |
| USD379176S | Cover for electrical boxes | General | 31 | Expired |
| US5417019A | Passthrough device with firestop | Mechanical Engineering; Lighting; Heating | 31 | Expired |
| US5866845A | Electrical box | Electricity | 25 | Expired |
| USD378913S | Cover for electrical boxes | General | 22 | Expired |
| US4807831A | Combination boundary layer control system for high altitude aircraft | Emerging Cross-Sectional Technologies | 14 | Expired |
| US3931944A | Thrust reversal system for jet aircraft engines | Mechanical Engineering; Lighting; Heating | 11 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.