HS

H. D. H. Showalter

WC Warner-Lambert Company: 1 patents #930 of 1,610Top 60%
📍 Ann Arbor, MI: #3,831 of 6,071 inventorsTop 65%
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6313292 Process for preparing 4,6-disubstituted pyrido[3,4-d]pyrimidines Roy T. Winters, Gordon William Rewcastle, William Alexander Denny 2001-11-06