Patents by Inventor David E. Hansen

David E. Hansen 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).

  • Particulate filtering
    Patent number: 4188197
    Abstract: A filter bag for dry copiers, i.e. copiers which employ particulate toner material. The bag comprises a filter element and a protective cover of porous non-woven material which imparts negligible resistance to air flow.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: February 12, 1980
    Assignee: Dennison Manufacturing Company
    Inventors: Suresh D. Amberkar, Elwood F. Hansen, David E. Hansen
  • Photographic camera or similar article
    Patent number: D244685
    Type: Grant
    Filed: March 22, 1976
    Date of Patent: June 14, 1977
    Assignee: Eastman Kodak Company
    Inventors: David E. Hansen, Wolfgang Ort
  • Photographic camera or similar article
    Patent number: D244686
    Type: Grant
    Filed: January 19, 1976
    Date of Patent: June 14, 1977
    Assignee: Eastman Kodak Company
    Inventor: David E. Hansen
  • Rechargeable power pack
    Patent number: D246240
    Type: Grant
    Filed: October 1, 1975
    Date of Patent: November 1, 1977
    Assignee: Eastman Kodak Company
    Inventor: David E. Hansen
  • Motion picture camera or the like
    Patent number: D247241
    Type: Grant
    Filed: August 6, 1976
    Date of Patent: February 14, 1978
    Assignee: Eastman Kodak Company
    Inventor: David E. Hansen
  • Photographic camera or similar article
    Patent number: D250958
    Type: Grant
    Filed: March 21, 1977
    Date of Patent: January 30, 1979
    Assignee: Eastman Kodak Company
    Inventor: David E. Hansen
  • Photographic camera having an electronic flash unit
    Patent number: D254791
    Type: Grant
    Filed: February 8, 1978
    Date of Patent: April 22, 1980
    Assignee: Eastman Kodak Company
    Inventor: David E. Hansen