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Alfonso V. Alvarez
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San Bernidino, CA, US
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Patents Grants
last 30 patents
Information
Patent Grant
Roof tile
Patent number
D452920
Issue date
Jan 8, 2002
Boral Lifetile, Inc.
Alfonso V. Alvarez
D25 - Building units and construction elements
Information
Patent Grant
Roof tile design and construction
Patent number
6,247,284
Issue date
Jun 19, 2001
Boral Lifetile, Inc.
Alfonso V. Alvarez
B28 - WORKING CEMENT, CLAY, OR STONE
Information
Patent Grant
Roof tile design and construction
Patent number
5,974,756
Issue date
Nov 2, 1999
Boral Industries, Inc.
Alfonso V. Alvarez
B28 - WORKING CEMENT, CLAY, OR STONE
Information
Patent Grant
Roof tile
Patent number
D411316
Issue date
Jun 22, 1999
Boral Lifetile, Inc.
Alfonso V. Alvarez
D25 - Building units and construction elements
Information
Patent Grant
Composition useful for lightweight roof tiles and method of produci...
Patent number
5,603,758
Issue date
Feb 18, 1997
Boral Concrete Products, Inc.
Walter A. Schreifels
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES