Douglas J. Hamar
10Patents
8h-index
8Co-inventors
65Inventor score
Filing activity: Aug 5, 1988 → Mar 2, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6173548A | Portable multi-section activity floor and method of manufacture and installation | Fixed Constructions | 244 | Expired |
| US5987839A | Multi-panel activity floor with fixed hinge connections | Emerging Cross-Sectional Technologies | 126 | Expired |
| US5121579A | Portable sectional flooring system with post support | Fixed Constructions | 34 | Expired |
| US6044606A | Floor system | Fixed Constructions | 28 | Expired |
| US6397543B1 | Floor system | Fixed Constructions | 13 | Expired |
| US6931808B2 | Floor system | Fixed Constructions | 11 | Expired |
| US5020286A | Portable sectional flooring system with post support | Fixed Constructions | 9 | Expired |
| US7419078B2 | Nailing device | Performing Operations; Transporting | 8 | Active |
| US7918579B2 | Lighted flooring | Mechanical Engineering; Lighting; Heating | 5 | Active |
| US8220949B2 | Lighted flooring | Mechanical Engineering; Lighting; Heating | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.