Robert M. Callahan

Follow

Person

Roanoke, VA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Joist reinforcing bracket
- Patent number D477210
- Issue date Jul 15, 2003
- Robert M. Callahan
- D08 - Tools and hardware
Information Patent Grant
Joist reinforcing bracket
- Patent number D472792
- Issue date Apr 8, 2003
- Robert M. Callahan
- D08 - Tools and hardware
Information Patent Grant
Joist reinforcing bracket
- Patent number D472791
- Issue date Apr 8, 2003
- Robert M. Callahan
- D08 - Tools and hardware
Information Patent Grant
Joist reinforcing bracket
- Patent number D472793
- Issue date Apr 8, 2003
- Robert M. Callahan
- D08 - Tools and hardware
Information Patent Grant
Internally reinforced girder with pierceable nonmetal components
- Patent number 5,921,053
- Issue date Jul 13, 1999
- Metwood, Inc.
- Robert M. Callahan
- E04 - BUILDING
Information Patent Grant
Composite beam
- Patent number 5,832,691
- Issue date Nov 10, 1998
- Robert M. Callahan
- E04 - BUILDING
Information Patent Grant
Composite beam
- Patent number 5,625,997
- Issue date May 6, 1997
- Robert M. Callahan
- E04 - BUILDING
Information Patent Grant
Joist reinforcing bracket
- Patent number 5,519,977
- Issue date May 28, 1996
- Robert M. Callahan
- E04 - BUILDING

Patents Applicationslast 30 patents

Information Patent Application
Joist reinforcing bracket
- Publication number 20030126820
- Publication date Jul 10, 2003
- Robert M. Callahan
- E04 - BUILDING
Information Patent Application
Joist reinforcing bracket
- Publication number 20020121066
- Publication date Sep 5, 2002
- Robert M. Callahan
- E04 - BUILDING