Patents by Inventor Jan Willem L. Prak

Jan Willem L. Prak 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).

  • One button digital watch and method of setting the display
    Patent number: 4059955
    Abstract: A system for digitally displaying watch functions and setting the value of these functions with a single actuator button wherein the button is movable to establish a first mode of operation to sequentially display the watch functions and is alternatively movable to establish a second mode of operation wherein the button may be employed to set or adjust the digital readout.
    Type: Grant
    Filed: November 12, 1975
    Date of Patent: November 29, 1977
    Assignee: Intersil, Inc.
    Inventor: Jan Willem L. Prak