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Inventor

HUDSON JR WILLARD CALVIN

US4 patents
⚠️ This page may combine multiple inventors who share the name “HUDSON JR WILLARD CALVIN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ELK CORP DALLAS

3 patents
US6418692B1Jul 16, 2002

Aesthetic, self-aligning shingle for hip, ridge, or rake portion of a roof

ELK CORP DALLAS82 citations95
US6289648B1Sep 18, 2001

Laminated roofing shingle

ELK CORP DALLAS135 citations95
US6199338B1Mar 13, 2001

Universal starter shingle

ELK CORP DALLAS106 citations93

ELK PREMIUM BUILDING PROD INC

1 patent
US6530189B2Mar 11, 2003

Aesthetic, self-aligning shingle for hip, ridge, or rake portion of a roof

ELK PREMIUM BUILDING PROD INC122 citations96