Robert D. Kampfer — 13 Patents at 3M

Robert D. Kampfer has been granted 13 US patents while listed as an inventor at 3M. The first was granted in 1986 and the most recent in May 2006. Robert D. Kampfer ranks #362,438 of 4,157,543 US inventors in our database (top 8.7%). Patent records list Robert D. Kampfer in Lake St. Croix Beach, MN, US.

Patents per Year

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Showing 1–13 of 13 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
7052639	Wire wound tooling	Michael R. Gorman, Thomas R. LaLiberte	2006-05-30	$23,904,000
6902389	Wire wound tooling	Michael R. Gorman, Thomas R. LaLiberte	2005-06-07	$21,469,000
D505064	Bundling strap	—	2005-05-17
D500671	Self-engaging bundling strap provided with machine readable code	Michael W. Mills	2005-01-11
6592800	Apparatus and method for making a mechanical fastener	Leon Levitt, James J. Kobe, Brian T. Hargrett, Cathleen M. Arsenault	2003-07-15	$16,943,000
6489003	Elastic fastener	Leon Levitt, Michael D. Delmore, Stephen E. Krampe, Brandon T. Berg, Alan J. Sipinen +2 more	2002-12-03	$22,403,000
6132660	Method for forming headed stem mechanical fasteners	—	2000-10-17	$21,776,000
6106922	Coextruded mechanical fastener constructions	John E. Cejka, Mark R. Dupre, Jeffrey O. Emslander, William H. Hartt, Francis V. Loncar, Jr. +8 more	2000-08-22
6000106	Superimposed embossing of capped stem mechanical fastener structures	Philip Miller	1999-12-14	$28,908,000
5868987	Superimposed embossing of capped stem mechanical fastener structures	Philip Miller	1999-02-09	$29,563,000
5556826	Laser perforation of paper	Kenneth J. Perrington	1996-09-17	$37,012,000
5444035	Laser perforation of paper	Kenneth J. Perrington	1995-08-22	$7,490,000
4563565	Method for forming a peripheral edge on contact lenses	Randall S. Blum	1986-01-07	$5,414,000

Robert D. Kampfer — 13 Patents

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