Patents by Inventor Justin Carroll

Justin Carroll 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).

  • Linear variable differential transformer with complimentary step-winding secondary coils
    Patent number: 7317371
    Abstract: A linear variable differential transformer comprising a coil form; a first primary coil; an optional second primary coil; a first secondary coil; and a second secondary coil; wherein the windings of the secondary coils create complimentary and preferably uniform steps. Each step is preferably wound in at least two layers. In the embodiment comprising two primary coils, the inductive couplings between the primary and secondary coils cause null position to be physically centered within the transformer.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: January 8, 2008
    Assignee: Pearl Process Systems, LLC
    Inventor: Anthony Justin Carroll
  • Head phone
    Patent number: D354958
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: January 31, 1995
    Assignee: Mark Grasso
    Inventors: Mark Grasso, John Hamagami, Justin Carroll
  • Walkie-talkie
    Patent number: D359281
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: June 13, 1995
    Assignee: Mark Grasso
    Inventors: Mark Grasso, John Hamagami, Justin Carroll
  • Walkie-talkie
    Patent number: D359282
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: June 13, 1995
    Assignee: Mark Grasso
    Inventors: Mark Grasso, John Hamagami, Justin Carroll
  • Belt clip
    Patent number: D359464
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: June 20, 1995
    Assignee: Mark Grasso
    Inventors: Mark Grasso, John Hamagami, Justin Carroll
  • Portable cassette player
    Patent number: D360207
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: July 11, 1995
    Assignee: Mark Grasso from Hamagami and Carroll
    Inventors: Mark Grasso, John Hamagami, Justin Carroll
  • Portable cassette player
    Patent number: D366485
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: January 23, 1996
    Assignee: Mark Grasso
    Inventors: Mark Grasso, John Hamagami, Justin Carroll