JF

Johannes A. Frankena

U.S. Philips: 2 patents #2,537 of 8,851Top 30%
Philips: 1 patents #3,761 of 7,731Top 50%
📍 Drachten, NL: #74 of 272 inventorsTop 30%
Overall (All Time): #1,235,527 of 4,157,543Top 30%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
8304998 Dimmable light generating device Harko Jan Taekema, Jacob Dijkstra, Pawel Leshem 2012-11-06
4950903 Irradiation device 1990-08-21
4866284 Irradiation device Jorrit Wijtsma, Marten F. Elkerbout 1989-09-12
4785190 Irradiation device 1988-11-15