Roy Heppinstall
9Patents
5h-index
12Co-inventors
60Inventor score
Filing activity: Feb 1, 1977 → Oct 31, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5239272A | Electron beam tube arrangements having primary and secondary output cavities | Electricity | 8 | Expired |
| US5283534A | High frequency amplifying apparatus with a collector which has a periodic amplitude variable longitudinal magnetic field therein | Electricity | 6 | Expired |
| US4733192A | Amplifying arrangements including a klystron having a power transfer characteristic which is substantially the same over its entire passband | Electricity | 6 | Expired |
| US5281923A | Amplifying arrangements which modulate an electron beam | Electricity | 6 | Expired |
| US5684364A | Electron beam tube collector having ceramic shielding means | Electricity | 5 | Expired |
| US5691667A | RF radiation absorbing material disposed between the cathode and anode of an electron beam tube | Electricity | 3 | Expired |
| US4099133A | Klystron amplifiers | Electricity | 2 | Expired |
| US7202605B2 | Electron beam tube apparatus having a common output combining cavity | Electricity | 1 | Expired |
| US4820996A | Amplifying arrangements | Electricity | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.