JK

James M. Kerkstra

SD Steelcase Development: 1 patents #261 of 472Top 60%
Overall (All Time): #3,511,345 of 4,157,543Top 85%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
6564154 Monitoring system Lynn A. Zimmerman, Ronald J. Kerkstra, Jr., Patricia Robin Hood, Kenneth L. Trumble, Edward C. Smit, Jr. +1 more 2003-05-13