David Alan Putnam
10Patents
3h-index
5Co-inventors
53Inventor score
Filing activity: Jan 11, 1985 → May 1, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4537044A | Food storage container | Emerging Cross-Sectional Technologies | 152 | Expired |
| US8851791B1 | Manhole cover venting and precipitation guarding devices | Fixed Constructions | 14 | Active |
| US9605403B1 | Vented precipitation guarding manhole cover assemblies | Fixed Constructions | 13 | Active |
| US11118323B1 | Traffic-compatible vented precipitation guarding manhole cover assemblies | Fixed Constructions | 3 | Active |
| US11536374B2 | Cleanout conduit valve assemblies and installations | Fixed Constructions | 0 | Active |
| US12345011B2 | Vented precipitation guarding manhole cover assembly | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US12270175B2 | Vented precipitation guarding manhole cover assembly | Mechanical Engineering; Lighting; Heating | 0 | Active |
| USD1024273S1 | Valve flapper | General | 0 | Active |
| US12320089B2 | Reinforced manhole cover gasket | Fixed Constructions | 0 | Active |
| US11274783B1 | Sure-seal cleanout conduit valve assemblies and methods | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.