David William Birch
9Patents
5h-index
17Co-inventors
60Inventor score
Filing activity: Jul 25, 1996 → Dec 21, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5732735A | Pressure reduction valve | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5954232A | Gas delivery system | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US6382227B1 | Production of constant composition gas mixture streams | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6047865A | Gas capsule and gas delivery system | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US5845811A | Gas capsule | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US7594639B2 | Cylinder valve | Emerging Cross-Sectional Technologies | 5 | Expired |
| US10466082B2 | Flow meter | Physics | 1 | Active |
| US9126281B2 | Integrated flow meter | Physics | 0 | Active |
| US6361020B1 | Valve for use with high purity gas | Mechanical Engineering; Lighting; Heating | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.