Errol C. Armstrong
13Patents
10h-index
15Co-inventors
69Inventor score
Filing activity: Oct 29, 1973 → Mar 29, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3934323A | Solar heat exchange panel and method of fabrication | Emerging Cross-Sectional Technologies | 40 | Expired |
| US6755430B1 | Wheelchair drive assembly | Human Necessities | 25 | Expired |
| US4098331A | Solar heat exchange panel and method of fabrication | Emerging Cross-Sectional Technologies | 23 | Expired |
| US6007082A | Wheelchair driver and braking system | Performing Operations; Transporting | 21 | Expired |
| US5263729A | Wheelchair driver and braking system | Performing Operations; Transporting | 20 | Expired |
| US4388035A | Dibble tube soil plug planter | Human Necessities | 19 | Expired |
| US7261309B2 | Wheelchair drive mechanism | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US4443151A | Automatic soil plug loader and feeder | Human Necessities | 15 | Expired |
| US4355588A | Transplanting machine | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6893035B2 | Wheelchair drive mechanism | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US4422990A | Method and apparatus for making soil plugs | Human Necessities | 8 | Expired |
| US4294179A | Dibble tube soil plug planter | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4598450A | Method for fabricating a solar energy collector assembly utilizing a specifically designed fluid storage arrangement | Emerging Cross-Sectional Technologies | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.