JP

John Purbrick

Overall (All Time): #1,636,664 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
6005951 Electronic stethoscope James A. Grasfield, David E. Winston, Peter R. H. Stark, Daniela Steinhubel 1999-12-21
6002777 Electronic stethoscope James A. Grasfield, David E. Winston, Peter R. H. Stark, Daniela Steinhubel 1999-12-14
5825895 Electronic stethoscope James A. Grasfield, David E. Winston, Peter R. H. Stark, Daniela Steinhubel 1998-10-20