Patents by Inventor Robert R. Ahlfinger

Robert R. Ahlfinger 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).

  • Television interface for handheld calculator for use with multiple calculator display formats
    Patent number: 6661465
    Abstract: An interface (10) for connecting a calculator (12) to a standard television (11), so that the calculator's display can be re-displayed on the television (1). The interface (10) is useful with different calculators having different display formats. Reformatting of the input signal is accomplished by dividing format detection and reformatting tasks between a field programmable gate array (21) and a microprocessor (23).
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: December 9, 2003
    Assignee: Texas Instruments Incorporated
    Inventors: Xiaoming Zhu, Robert R. Ahlfinger
  • Television interface for handheld calculator for use with multiple calculator display formats
    Publication number: 20010035914
    Abstract: An interface (10) for connecting a calculator (12) to a standard television (11), so that the calculator's display can be re-displayed on the television (1). The interface (10) is useful with different calculators having different display formats. Reformatting of the input signal is accomplished by dividing format detection and reformatting tasks between a field programmable gate array (21) and a microprocessor (23).
    Type: Application
    Filed: April 16, 2001
    Publication date: November 1, 2001
    Inventors: Xiaoming Zhu, Robert R. Ahlfinger
  • Display demonstration system for providing enlarged projected image of calculator display
    Patent number: 5168294
    Abstract: A calculator (20) or other computing device uses a remote display (22) set upon an elevated platform (26) above the base (12) of an overhead projector (10). Light through the base lens (14) is passed through the display (22) and is enlarged by lens (30).
    Type: Grant
    Filed: September 27, 1991
    Date of Patent: December 1, 1992
    Assignee: Texas Instruments Incorporated
    Inventors: Peter H. Davis, Brad V. Christensen, Robert R. Ahlfinger