MS

Marshall J. Smith

HT Helix Technology: 1 patents #58 of 132Top 45%
Overall (All Time): #3,985,945 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4708165 High pressure stepped clearance seal valve in a cryogenic refrigeration system Philip A. Lessard 1987-11-24