Patents by Inventor John Charles Calhoon

John Charles Calhoon 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).

  • Inductive power adapter
    Patent number: 7378817
    Abstract: An inductive power systems transfers energy by inductively coupling a source coil on a power source to a receiver coil on a power portion of a power adapter. The source current is received in the power adapter and converted to direct current for transmission to a computer system. Wireless communication between a power source and the power adapter is provided. A wireless communication arrangement provides for authentication of devices that are allowed by a source to be powered.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: May 27, 2008
    Assignee: Microsoft Corporation
    Inventors: John Charles Calhoon, Leroy B. Keely, William Mitchell
  • Inductive battery charger
    Patent number: 7375493
    Abstract: An inductive charging system transfers energy by inductively coupling a source coil on a power source to a receiver coil for a battery charger. Source current may be received in the battery charger and converted for charging a battery pack. A wireless communication arrangement may also provide for authentication of devices that are allowed by the source to be powered or otherwise charged.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: May 20, 2008
    Assignee: Microsoft Corporation
    Inventors: John Charles Calhoon, Leroy B. Keely, William Mitchell
  • Inductively charged battery pack
    Patent number: 7375492
    Abstract: An inductive charging systems transfers energy by inductively coupling a source coil on a charging source to a receiver coil on a charging portion of a battery pack. The source current is received in the battery pack and converted to direct current for storage in the battery pack cells. Communication between a charging source and the charging portion is provided. A wireless communication arrangement provides for authentication of devices that are allowed by a source to be charged.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: May 20, 2008
    Assignee: Microsoft Corporation
    Inventors: John Charles Calhoon, Leroy B. Keely, William Mitchell