Patents by Inventor David P. Baldwin

David P. Baldwin 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).

  • Patent number: 6253365
    Abstract: An automated system for designing digital logic from a user input functional specification. The input to the system is a specification that describes the input and output signals of the desired circuit, the type of logic gates and flip-flops to be used, and optional design controls such as “NO GLITCHES”. Using a highly-constrained exhaustive search technique and a built-in logic simulator, the system automatically finds the simplest possible circuit that meets the user specification. The output of the system is at least a schematic drawing of the minimal logic circuit. The system is able to design any type of digital logic: combinational, sequential, synchronous or asynchronous.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: June 26, 2001
    Inventor: David P. Baldwin
  • Patent number: 5092651
    Abstract: A control assembly moves a sunroof panel between a rearwardly upwardly tilted venting position, a closed position flush with the vehicle roof and a rearwardly downwardly tilted collapsed position from which the sunroof is retracted into a recess in the vehicle roof. The control assembly includes a carriage constrained within guide tracks and having a lift cam surface and a collapse cam surface. An actuator arm is pivoted to the sunroof panel and captured by the carriage and includes a lift cam follower which cooperates with the lift cam surface to move the sunroof panel toward the venting position, and a collapse cam follower cooperating with the collapse cam surface to move the sunroof panel toward the collapsed position. A brace member extends between the carriage and the actuator arm for assisting movement of the sunroof panel between the collapsed position and the venting position.
    Type: Grant
    Filed: August 3, 1990
    Date of Patent: March 3, 1992
    Assignee: General Motors Corporation
    Inventors: David P. Baldwin, Jean M. Denat, Jose A. Mirkin
  • Patent number: 5069501
    Abstract: A control assembly moves a sunroof panel between a closed position sealing an opening in a vehicle roof, a tilted open position with one end of the sunroof panel disposed at a different elevation with respect to the other to form a spoiler and a fully opened position wherein the sunroof panel is substantially parallel to the vehicle roof. A drive member is slideably moveable along a guide member between predetermined positions and includes a pair of drive cam surfaces. A panel orientating member is fixedly disposed with respect to the guide member and includes a pair of cam orientating surfaces.
    Type: Grant
    Filed: August 3, 1990
    Date of Patent: December 3, 1991
    Assignee: General Motors Corporation
    Inventors: David P. Baldwin, Stephanus F. Du Toit, Jose A. Mirkin