DH

Derk Hamminga

DB Duphar International Research B.V.: 3 patents #2 of 27Top 8%
📍 Weesp, NL: #2 of 31 inventorsTop 7%
Overall (1994): #13,927 of 165,921Top 9%
3
Patents 1994

Issued Patents 1994

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5332746 8,9-annelated-.beta.-carbolines and 8,9-annelated 3,4-dihydro-.beta.-carbolines Hans H. Haeck, Ineke van Wijngaarden, Johannes W. C. M. Jansen 1994-07-26
5328905 8,9-anellated-1,2,3,4-tetrahydro-.beta.-carboline derivatives Ineke van Wijngaarden, Johannes W. C. M. Jansen 1994-07-12
5326768 3,4-annelated benzimidazol-2-(1H)-one 1-carboxylic acid derivatives Ineke van Wijngaarden, Wouter Wouters 1994-07-05