Donald J. Kerfeld

IM Imation: 2 patents #7 of 55Top 15%

📍 Windom, MN: #39 of 283 inventorsTop 15%

🗺 Minnesota: #587 of 4,549 inventorsTop 15%

Overall (2002): #67,561 of 266,432Top 30%

Patents 2002

Issued Patents 2002

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
6365329	Process for making multiple data storage disk stampers from one master	—	2002-04-02
6354827	Stamper assembly for manufacturing optical data storage disks	—	2002-03-12