Richard D. Williams

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Lancaster, GB

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Patents Grantslast 30 patents

Information Patent Grant
Supplied air helmet having face seal with differentiated permeability
- Patent number 7,197,774
- Issue date Apr 3, 2007
- 3M Innovative Properties Company
- Desmond T. Curran
- A62 - LIFE-SAVING FIRE-FIGHTING

Patents Applicationslast 30 patents

Information Patent Application
Respirator System Including Removable Head Suspension
- Publication number 20100263671
- Publication date Oct 21, 2010
- Garry J. Walker
- A62 - LIFE-SAVING FIRE-FIGHTING
Information Patent Application
Supplied air helmet having a knitted face seal
- Publication number 20060107431
- Publication date May 25, 2006
- Desmond T. Curran
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
Supplied air helmet having face seal with differentiated permeability
- Publication number 20060101555
- Publication date May 18, 2006
- Desmond T. Curran
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
Frictionally engaged supplied air helmet face seal
- Publication number 20060101552
- Publication date May 18, 2006
- Peter D. Lee
- A62 - LIFE-SAVING FIRE-FIGHTING