John D. Grinstead

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Durham, NC, US

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Patents Grantslast 30 patents

Information Patent Grant
Component and method for restoring a stairway
- Patent number 7,073,297
- Issue date Jul 11, 2006
- J.D. Grinstead General Construction Company, Inc.
- John D. Grinstead
- E04 - BUILDING
Information Patent Grant
Component and method for restoring a stairway
- Patent number 6,895,717
- Issue date May 24, 2005
- J.D. Grinstead General Construction Company, Inc.
- John D. Grinstead
- E04 - BUILDING

Patents Applicationslast 30 patents

Information Patent Application
Component and method for restoring a stairway
- Publication number 20050210775
- Publication date Sep 29, 2005
- John D. Grinstead
- E04 - BUILDING