DK

Dirk K. Kettenes

PB Polak'S Frutal Works B.V.: 2 patents #2 of 10Top 20%
📍 Putten, NL: #6 of 28 inventorsTop 25%
Overall (All Time): #1,308,877 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
4477678 Sulfur-containing flavoring agents Steven van den Bosch, Kris B. de Ross, Gerben Sipma, Jan Stoffelsma 1984-10-16
4380655 Novel sulfur-containing flavoring agents Steven van den Bosch, Kris Bart de Roos, Gerben Sipma, Jan Stoffelsma 1983-04-19
4288350 Perfume compositions containing dialkyl delta-lactones Kees N. Nieuwland 1981-09-08
4219449 Carane nitriles Willem Lenselink 1980-08-26