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David M. Hansen
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American Fork, UT, US
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Patents Grants
last 30 patents
Information
Patent Grant
Insulating connectors used to retain forms during the manufacture o...
Patent number
6,138,981
Issue date
Oct 31, 2000
H.K. Composites, Inc.
David O. Keith
E04 - BUILDING
Information
Patent Grant
Insulating connector rods and methods for their manufacture
Patent number
6,112,491
Issue date
Sep 5, 2000
H.K. Composites, Inc.
David O. Keith
B28 - WORKING CEMENT, CLAY, OR STONE
Information
Patent Grant
Connectors and brackets used in making insulated composite wall str...
Patent number
5,996,297
Issue date
Dec 7, 1999
H. K. Composites, Inc.
David O. Keith
E04 - BUILDING
Information
Patent Grant
Insulating connector rods and their methods of manufacture
Patent number
5,987,834
Issue date
Nov 23, 1999
H. K. Composites, Inc.
David O. Keith
B28 - WORKING CEMENT, CLAY, OR STONE
Information
Patent Grant
Methods for manufacturing highly insulative composite wall structures
Patent number
5,830,399
Issue date
Nov 3, 1998
H. K. Composites, Inc.
David O. Keith
B28 - WORKING CEMENT, CLAY, OR STONE
Information
Patent Grant
Multi-prong connectors used in making highly insulated composite wa...
Patent number
5,809,723
Issue date
Sep 22, 1998
H.K. Composites, Inc.
David O. Keith
E04 - BUILDING
Information
Patent Grant
Insulating connector rods used in making highly insulated composite...
Patent number
5,673,525
Issue date
Oct 7, 1997
H. K. Composites, Inc.
David O. Keith
B28 - WORKING CEMENT, CLAY, OR STONE
Information
Patent Grant
Connectors used in making highly insulated composite wall structures
Patent number
5,606,832
Issue date
Mar 4, 1997
H. K. Composites, Inc.
David O. Keith
B28 - WORKING CEMENT, CLAY, OR STONE
Information
Patent Grant
Highly insulative connector rods and methods for their manufacture...
Patent number
5,519,973
Issue date
May 28, 1996
H. K. Composites, Inc.
David O. Keith
B28 - WORKING CEMENT, CLAY, OR STONE
Information
Patent Grant
Insulating wall tie for concrete sandwich walls
Patent number
D357855
Issue date
May 2, 1995
H. K. Composites, Inc.
David O. Keith
D08 - Tools and hardware