Patents by Inventor David P. Perkins

David P. Perkins 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).

  • Publication number: 20150253231
    Abstract: An apparatus for determining the density of a fluid in a flowstream is disclosed. The apparatus comprises a vibrating tube (12) having a bore and a vibrating region. The apparatus also comprises a housing (16) to support the vibrating region. The apparatus further comprises a vibration source (22) and a vibration detector (24) coupled to the vibrating tube (12), and one or more sensors (26) coupled to the housing (16), said one or more sensors substantially oriented toward the vibrating region of the vibrating tube.
    Type: Application
    Filed: December 6, 2012
    Publication date: September 10, 2015
    Inventors: Li Gao, Wei Zhang, David P. Perkins, Dingding Chen, Nestor Rodriquez
  • Patent number: 7926812
    Abstract: Disclosed is a collector-targeted, memorabilia-bearing trading card set. Each comprises a plurality of cards originating from and assembleable into a set. Each card is formed from at least two layers of material, a first layer being at least a portion of memorabilia having a visual attribute exposed on one side of the card and a second layer that comprises a substrate providing an opposite side surface of the card. The opposite side surface has indicia conveying information related to the memorabilia of the first layer and associating it with the set from which it originated. The memorabilia attribute is positioned to have a portion of the attribute divided between at least two of the cards and extending across adjoining, cut edge portions of at least two cards of the set.
    Type: Grant
    Filed: November 12, 2007
    Date of Patent: April 19, 2011
    Assignee: USA Baseball
    Inventor: David P. Perkins
  • Publication number: 20090121436
    Abstract: Disclosed is a collector-targeted, memorabilia-bearing trading card set. Each comprises a plurality of cards originating from and assembleable into a set. Each card is formed from at least two layers of material, a first layer being at least a portion of memorabilia having a visual attribute exposed on one side of the card and a second layer that comprises a substrate providing an opposite side surface of the card. The opposite side surface has indicia conveying information related to the memorabilia of the first layer and associating it with the set from which it originated. Each of the cards has a perimeter, at least a portion of which includes a cut edge of the first layer with a borderless appearance. The memorabilia attribute is positioned to have a portion of the attribute divided between at least two of the cards and extending across adjoining, cut edge portions of at least two cards of the set.
    Type: Application
    Filed: November 12, 2007
    Publication date: May 14, 2009
    Inventor: David P. Perkins