Patents by Inventor Roger D. Pace

Roger D. Pace 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).

  • Universal interface for data communication systems
    Patent number: 4385394
    Abstract: A system for transmitting and receiving serial data over a pair of differential lines so that relatively large differences in ground potential will not affect the integrity of the transmitted data. Each differential line has a first switch for pulling the line high and a second switch for pulling the line low. Logical gates hold all switches off to allow the lines to float in response to a first control signal. A second control signal enables the logical gates to pull the first differential line up and the second differential line down whenever true data is to be sent and for pulling the second differential line up and the first differential line down whenever data is true. Associated with each switch is a protective diode and cold filament lamp for protecting the respective switch and insuring system operation even if large swings in ground potential occur.
    Type: Grant
    Filed: January 23, 1981
    Date of Patent: May 24, 1983
    Assignee: Datavision, Inc.
    Inventor: Roger D. Pace