Inventor
HELMER JOHN C
US15 patents
⚠️ This page may combine multiple inventors who share the name “HELMER JOHN C”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
VARIAN ASSOCIATES
11 patentsUS5252194AOct 12, 1993
Rotating sputtering apparatus for selected erosion
VARIAN ASSOCIATES181 citations97
US4995958AFeb 26, 1991
Sputtering apparatus with a rotating magnet array having a geometry for specified target erosion profile
VARIAN ASSOCIATES103 citations96
US5330628AJul 19, 1994
Collimated deposition apparatus and method
VARIAN ASSOCIATES110 citations95
US5235409AAug 10, 1993
Optical detection system for capillary separation columns
VARIAN ASSOCIATES39 citations92
US4774437ASep 27, 1988
Inverted re-entrant magnetron ion source
VARIAN ASSOCIATES45 citations92
US4606806AAug 19, 1986
Magnetron sputter device having planar and curved targets
VARIAN ASSOCIATES35 citations92
US4437812AMar 20, 1984
Single-pump multiple stroke proportioning for gradient elution liquid chromatography
VARIAN ASSOCIATES59 citations92
US5635036AJun 3, 1997
Collimated deposition apparatus and method
VARIAN ASSOCIATES28 citations90
US4629548ADec 16, 1986
Planar penning magnetron sputtering device
VARIAN ASSOCIATES8 citations73
US5456575AOct 10, 1995
Non-centric improved pumping stage for turbomolecular pumps
VARIAN ASSOCIATES19 citations72
US5449270ASep 12, 1995
Tangential flow pumping channel for turbomolecular pumps
VARIAN ASSOCIATES2 citations61