John Spence
5Patents
4h-index
5Co-inventors
50Inventor score
Filing activity: Nov 27, 1981 → Jun 5, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US9672336B1 | Security system for verification of user credentials | Physics | 31 | Active |
| US5251548A | Missile acceleration and arming device | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US7643489B2 | Methods and systems for providing bandwidth on demand in communication systems | Electricity | 5 | Active |
| US6520294B2 | Tire bead lubricating assembly and method of lubricating a tire bead | Performing Operations; Transporting | 4 | Expired |
| US10073958B2 | Security system for verification of user credentials | Physics | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.