Patents by Inventor Edward Oscar Johnson

Edward Oscar Johnson 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).

  • Electronic timepiece
    Patent number: 4007583
    Abstract: The electrooptic display of an electronic timepiece has a total of only twelve indicator elements. Hours are indicated by causing one element to produce one kind of optical output such as steady illumination. Minutes are indicated by causing an element to produce another kind of optical output such as intensity modulated illumination. The particular element selected for intensity modulation is a coarse indication of minutes (5 minute increments); the modulation itself is a fine indication of minutes (1 minute increments). Similar techniques may be employed for indicating the month and day.
    Type: Grant
    Filed: May 22, 1975
    Date of Patent: February 15, 1977
    Assignee: RCA Corporation
    Inventor: Edward Oscar Johnson