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John R. Crigler
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Morgan Hill, CA, US
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Patents Grants
last 30 patents
Information
Patent Grant
Vent flow apparatus and method
Patent number
6,209,274
Issue date
Apr 3, 2001
VSL International
John R. Crigler
E04 - BUILDING
Information
Patent Grant
Mechnically stabilized retaining wall system having adjustable conn...
Patent number
5,971,669
Issue date
Oct 26, 1999
L.B. Foster Company
John Richard Crigler
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Patent Grant
Post-tensioning apparatus and method
Patent number
5,939,003
Issue date
Aug 17, 1999
VSL International
John Richard Crigler
E04 - BUILDING
Information
Patent Grant
Post-tensioning anchor head assembly
Patent number
5,596,854
Issue date
Jan 28, 1997
VSL International AG
John R. Crigler
E04 - BUILDING