Inventor

KROL JOHANNES W A

2 patents

Patents

2 patents

US4137477AJan 30, 1979

Electrodes, for example grid-like electrodes for use in electron tubes, and a method for manufacturing same

PHILIPS CORP21 citations79

US4178530ADec 11, 1979

Electron tube with pyrolytic graphite heating element

PHILIPS CORP8 citations71