JH

John Heffer

JL Johnson Matthey Public Limited: 1 patents #446 of 922Top 50%
Overall (All Time): #4,068,148 of 4,157,543Top 100%
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4324700 Process for preparing platinum group metal catalysts — 1982-04-13