RH

Roy Heppinstall

EL Eev Limited: 4 patents #2 of 62Top 4%
EC English Electric Valve Co.: 3 patents #12 of 66Top 20%
BB British Broadcasting: 2 patents #29 of 118Top 25%
Overall (All Time): #660,017 of 4,157,543Top 20%
8
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
7202605 Electron beam tube apparatus having a common output combining cavity David Mark Wilcox 2007-04-10
5691667 RF radiation absorbing material disposed between the cathode and anode of an electron beam tube Alan H. Pickering, Geoffrey John Rowlands, Edward Stanley Sobieradzki, Geoffrey Clayworth 1997-11-25
5684364 Electron beam tube collector having ceramic shielding means Steven Bardell, Stuart William Andrews 1997-11-04
5283534 High frequency amplifying apparatus with a collector which has a periodic amplitude variable longitudinal magnetic field therein Heinz Bohlen 1994-02-01
5281923 Amplifying arrangements which modulate an electron beam 1994-01-25
5239272 Electron beam tube arrangements having primary and secondary output cavities Heinz Bohlen, David Mark Wilcox, Mark E. Bridges, Steven Bardell 1993-08-24
4820996 Amplifying arrangements Paul Eaton, George I. F. Tupper, Edmund K. Tunstall 1989-04-11
4733192 Amplifying arrangements including a klystron having a power transfer characteristic which is substantially the same over its entire passband George I. F. Tupper, Paul Eaton, Edmund K. Tunstall 1988-03-22