Bill Witherspoon

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Guelph, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Fire and water resistant expansion and seismic joint system
- Patent number 8,813,449
- Issue date Aug 26, 2014
- Emseal Joint Systems LTD
- Lester Hensley
- E04 - BUILDING
Information Patent Grant
Fire and water resistant expansion and seismic joint system
- Patent number 8,813,450
- Issue date Aug 26, 2014
- Emseal Joint Systems LTD
- Lester Hensley
- E04 - BUILDING
Information Patent Grant
Fire and water resistant expansion joint system
- Patent number 8,739,495
- Issue date Jun 3, 2014
- Emseal Joint Systems LTD
- Bill Witherspoon
- E04 - BUILDING

Patents Applicationslast 30 patents

Information Patent Application
FIRE AND/OR WATER RESISTANT EXPANSION AND SEISMIC JOINT SYSTEM
- Publication number 20170292262
- Publication date Oct 12, 2017
- EMSEAL JOINT SYSTEMS LTD.
- Lester Hensley
- E04 - BUILDING