Membership
Tour
Register
Log in
David M. Hopstock
Follow
Person
Roseville, MN, US
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Optical fiber encoded with data signal
Patent number
6,650,815
Issue date
Nov 18, 2003
Corning Incorporated
Daniel W. Hawtof
G02 - OPTICS
Information
Patent Grant
Conformable magnetic articles for use with traffic bearing surfaces...
Patent number
6,468,678
Issue date
Oct 22, 2002
3M Innovative Properties Company
Thomas J. Dahlin
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Magnetic separator apparatus and methods regarding same
Patent number
6,253,924
Issue date
Jul 3, 2001
Regents of The University of Minnesota
Rodney L. Bleifuss
B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES O...
Information
Patent Grant
Conformable magnetic articles underlaid beneath traffic-bearing sur...
Patent number
5,853,846
Issue date
Dec 29, 1998
Minnesota Mining and Manufacturing Company
Gary W. Clark
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Hexagonal magnetic ferrite pigment for high density magnetic record...
Patent number
5,626,956
Issue date
May 6, 1997
Imation Corp.
David M. Hopstock
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
Hexagonal magnetic ferrite pigment for high density magnetic record...
Patent number
5,616,414
Issue date
Apr 1, 1997
Imation Corp.
David M. Hopstock
G11 - INFORMATION STORAGE
Information
Patent Grant
Process of making hexagonal magnetic ferrite pigment for high densi...
Patent number
5,378,384
Issue date
Jan 3, 1995
Minnesota Mining and Manufacturing Company
David M. Hopstock
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Patents Applications
last 30 patents
Information
Patent Application
Optical fiber encoded with data signal
Publication number
20030026568
Publication date
Feb 6, 2003
Daniel W. Hawtof
G02 - OPTICS