Patents by Inventor Jindrich Kohoutek

Jindrich Kohoutek 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).

  • Adaptable programmed calculator including a percent keyboard operator
    Patent number: 4181966
    Abstract: An adaptable calculator is provided by employing five MOS/LSI circuits interconnected by a multiple line bus system. They include (1) a read-only memory circuit group; (2) a control and timing circuit; (3) an arithmetic and register circuit; (4) a data storage circuit; and (5) an input/output (I/O) circuit. Input and output units include a keyboard input unit and an 18-column output printer unit for printing intermediate results of calculations, entered data, arithmetic operators, and diagnostic notes. The keyboard input unit includes a PERCENT key that may be employed in combination with any of four arithmetic operator keys. The calculator may be operated manually by the user from the keyboard input unit or automatically by a program written in user-level language and stored in a plug-in read-only memory unit (ROM), a plug-in programmable read-only memory unit (PROM) or a read/write memory unit associated with a plug-in magnetic card reading and recording unit.
    Type: Grant
    Filed: April 28, 1976
    Date of Patent: January 1, 1980
    Assignee: Hewlett-Packard Company
    Inventors: Freddie W. Wenninger, Donald E. Morris, Jindrich Kohoutek, David S. Maitland, Douglas M. Clifford, Louis T. Schulte, John C. Keith
  • Adaptable programmed calculator including automatic decimal point positioning
    Patent number: 4156921
    Abstract: An adaptable calculator is provided by employing five MOS/LSI circuits interconnected by a multiple line bus system. They include (1) a read-only memory circuit group; (2) a control and timing circuit; (3) an arithmetic and register circuit; (4) a data storage circuit; and (5) an input/output (I/O) circuit.Input and output units include a keyboard input unit and an 18-column output printer unit. An optional LED display unit may be plugged into the calculator mainframe. The keyboard input unit includes an AUTO DECIMAL POINT key for selecting an automatic decimal point mode of calculator operation in which the calculator automatically places the decimal point at a specified location in all entered data. Thus, the operator need not manually enter the decimal point in entered data. The calculator may be operated manually by the user from the keyboard input unit or automatically by a program stored in the calculator memory.
    Type: Grant
    Filed: April 28, 1976
    Date of Patent: May 29, 1979
    Assignee: Hewlett-Packard Company
    Inventors: Freddie W. Wenninger, Donald E. Morris, Jindrich Kohoutek, David S. Maitland, Douglas M. Clifford, Louis T. Schulte, John C. Keith
  • Adaptable programmed calculator having provision for plug-in keyboard and memory modules
    Patent number: 3971925
    Abstract: An adaptable calculator is provided by employing five MOS/LSI circuits interconnected by a multiple line bus system.
    Type: Grant
    Filed: June 6, 1974
    Date of Patent: July 27, 1976
    Assignee: Hewlett-Packard Company
    Inventors: Freddie W. Wenninger, Donald E. Morris, Jindrich Kohoutek, David S. Maitland, Douglas M. Clifford, Louis T. Schulte, John C. Keith