David W. Powell

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Austin, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Precast park refuge construction method and apparatus
- Patent number 10,494,771
- Issue date Dec 3, 2019
- David W. Powell
- E04 - BUILDING
Information Patent Grant
System for construction of a compression structure with corner bloc...
- Patent number 7,665,250
- Issue date Feb 23, 2010
- David W. Powell
- E04 - BUILDING

Patents Applicationslast 30 patents

Information Patent Application
Method and apparatus for precast wall and floor block system
- Publication number 20080282623
- Publication date Nov 20, 2008
- David W. Powell
- E04 - BUILDING
Information Patent Application
Precast construction method and apparatus for variable size elevate...
- Publication number 20070261335
- Publication date Nov 15, 2007
- David W. Powell
- E04 - BUILDING
Information Patent Application
Method and apparatus for precision slip-forming of complex precast...
- Publication number 20060150556
- Publication date Jul 13, 2006
- David W. Powell
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Application
Method and system for prefabricated construction
- Publication number 20040237439
- Publication date Dec 2, 2004
- David W. Powell
- E04 - BUILDING
Information Patent Application
Method and apparatus for precast and framed block element construction
- Publication number 20040134152
- Publication date Jul 15, 2004
- David W. Powell
- B28 - WORKING CEMENT, CLAY, OR STONE