JF

John Fjeldsted

HP HP: 2 patents #19 of 405Top 5%
🗺 California: #676 of 10,592 inventorsTop 7%
Overall (1989): #23,959 of 140,708Top 20%
2
Patents 1989

Issued Patents 1989

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4885500 Quartz quadrupole for mass filter Stuart C. Hansen, Carolyn C. Broadbent 1989-12-05
4804839 Heating system for GC/MS instruments Carolyn C. Broadbent 1989-02-14