Patents by Inventor Cecil E. Campbell

Cecil E. Campbell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Air filtration apparatus and method
    Patent number: 9084905
    Abstract: An air filtration apparatus is disclosed. During inhale response, user's breath opens a first air valve causing air flow through replaceable filter through a chamber to a mouth piece disposed in a user's mouth. During exhale response, user's breath closes first valve causing one or more exhaust valves to open. In one embodiment, inhale and exhale responses are displaced from one another to provide better isolation of replaceable filter.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: July 21, 2015
    Inventor: Cecil E. Campbell
  • AIR FILTRATION APPARATUS AND METHOD
    Publication number: 20110030691
    Abstract: An air filtration apparatus is disclosed. During inhale response, user's breath opens a first air valve causing air flow through replaceable filter through a chamber to a mouth piece disposed in a user's mouth. During exhale response, user's breath closes first valve causing one or more exhaust valves to open. In one embodiment, inhale and exhale responses are displaced from one another to provide better isolation of replaceable filter.
    Type: Application
    Filed: October 20, 2010
    Publication date: February 10, 2011
    Inventor: Cecil E Campbell
  • AIR FILTRATION APPARATUS AND METHOD
    Publication number: 20100071699
    Abstract: An air filtration apparatus is disclosed. During inhale response, user's breath opens a first air valve causing air flow through replaceable filter through a chamber to a mouth piece disposed in a user's mouth. During exhale response, user's breath closes first valve causing one or more exhaust valves to open. In one embodiment, inhale and exhale responses are displaced from one another to provide better isolation of replaceable filter.
    Type: Application
    Filed: September 24, 2008
    Publication date: March 25, 2010
    Inventors: Cecil E. Campbell, Lonnie David Cooper, SR.
  • Air filtration mask
    Patent number: D680215
    Type: Grant
    Filed: October 3, 2010
    Date of Patent: April 16, 2013
    Inventor: Cecil E. Campbell