PD

Petrus J. A. M. Derks

U.S. Philips: 2 patents #30 of 679Top 5%
Overall (1994): #23,065 of 165,921Top 15%
2
Patents 1994

Issued Patents 1994

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5347194 Oxide cathode with rare earth addition — 1994-09-13
5277637 Cathode for an electric discharge tube — 1994-01-11