JG

Jan Gerkema

U.S. Philips: 8 patents #426 of 8,851Top 5%
Overall (All Time): #671,484 of 4,157,543Top 20%
8
Patents All Time

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDate
4644577 X-ray tube comprising an anode disc rotatably journalled on a helical-groove bearing Johannes L. M. Hagen, Johan A. Rietdijk 1987-02-17
4641332 X-ray tube comprising anode disc rotatably supported by bearing having push-pull bearing on an axial face 1987-02-03
4614445 Metal-lubricated helical-groove bearing comprising an anti-wetting layer Jozef B. Pelzer 1986-09-30
4562587 X-Ray tube having a rotary anode Anton K. Niessen, Jozef B. Pelzer 1985-12-31
4490264 Device incorporating a bearing Andries R. Miedema 1984-12-25
4357555 Rotary anode X-ray tube Evert M. H. Kamerbeek 1982-11-02
4300177 Thin-film magnetic head for reading and writing information Gerrit J. Koel, Frederik W. Gorter 1981-11-10
4210371 Rotary-anode X-ray tube Everhardus A. Muijderman 1980-07-01