HM

Helen M. Massey

IC ICI: 2 patents #677 of 2,189Top 35%
📍 Leigh, GB: #3 of 18 inventorsTop 20%
Overall (All Time): #2,307,395 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5091600 Tetrafluoroethane isomerization Geoffrey James Moore 1992-02-25
4950815 Tetrafluoroethane isomerization Geoffrey James Moore 1990-08-21