Robert R. Hay
8Patents
8h-index
11Co-inventors
66Inventor score
Filing activity: May 11, 1978 → Jul 29, 1998
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4535343A | Thermal ink jet printhead with self-passivating elements | Performing Operations; Transporting | 81 | Expired |
| US4694308A | Barrier layer and orifice plate for thermal ink jet printhead assembly | Emerging Cross-Sectional Technologies | 50 | Expired |
| US4716423A | Barrier layer and orifice plate for thermal ink jet print head assembly and method of manufacture | Emerging Cross-Sectional Technologies | 46 | Expired |
| US4590482A | Nozzle test apparatus and method for thermal ink jet systems | Performing Operations; Transporting | 43 | Expired |
| US5239431A | Head lift limiter for a disk drive | Physics | 26 | Expired |
| US6239879A | Non-contacting communication and power interface between a printing engine and peripheral systems attached to replaceable printer component | Physics | 16 | Expired |
| US4408865A | Corona discharge device for electrophotographic charging and potential leveling | Physics | 15 | Expired |
| US4197493A | Electrostatic voltmeter | Physics | 12 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.