GH

Geoffrey H. Humberstone

VF Viratec Thin Films: 2 patents #9 of 27Top 35%
PH Photran: 1 patents #4 of 7Top 60%
📍 Northfield, MN: #50 of 168 inventorsTop 30%
🗺 Minnesota: #19,064 of 52,454 inventorsTop 40%
Overall (All Time): #1,655,003 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5328585 Linear planar-magnetron sputtering apparatus with reciprocating magnet-array David E. Stevenson 1994-07-12
5200049 Cantilever mount for rotating cylindrical magnetrons David E. Stevenson, Erik J. Bjornard 1993-04-06
5100527 Rotating magnetron incorporating a removable cathode David E. Stevenson, Erik J. Bjornard 1992-03-31