Inventor
KERFELD DONALD J
US22 patents
⚠️ This page may combine multiple inventors who share the name “KERFELD DONALD J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
IMATION CORP
14 patentsUS6190838B1Feb 20, 2001
Process for making multiple data storage disk stampers from one master
IMATION CORP59 citations96
US7352685B2Apr 1, 2008
Reverse optical mastering for data storage disk replicas
IMATION CORP10 citations92
US6616867B2Sep 9, 2003
Multi-generation stampers
IMATION CORP19 citations92
US6354827B1Mar 12, 2002
Stamper assembly for manufacturing optical data storage disks
IMATION CORP22 citations92
US6638692B1Oct 28, 2003
Replicated regions on optical disks
IMATION CORP19 citations80
US7801016B2Sep 21, 2010
Reverse optical mastering for data storage disk replicas
IMATION CORP6 citations74
US7600992B2Oct 13, 2009
Reverse optical mastering for data storage disk stamper
IMATION CORP6 citations74
US6365329B2Apr 2, 2002
Process for making multiple data storage disk stampers from one master
IMATION CORP11 citations73
US7114947B2Oct 3, 2006
Optical disk mold tooling for reduced edge wedge
IMATION CORP3 citations62
US6752611B2Jun 22, 2004
Optical disk mold tooling for reduced edge wedge
IMATION CORP3 citations62
US6977052B1Dec 20, 2005
Check disk for optical data storage disk manufacturing
IMATION CORP5 citations58
US6821460B2Nov 23, 2004
Two-sided replication of data storage media
IMATION CORP3 citations57
US7952986B2May 31, 2011
Reverse optical mastering for data storage disk replicas
IMATION CORP0 citations52
US6961950B2Nov 1, 2005
Variable thickness stamper for creation of flat molded substrates
IMATION CORP0 citations47