RH

Roy Heppinstall

EL Eev Limited: 1 patents #2 of 6Top 35%
EC English Electric Valve Co.: 1 patents #1 of 5Top 20%
Overall (1997): #25,948 of 185,788Top 15%
2
Patents 1997

Issued Patents 1997

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
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