Patents by Inventor Luis Ramirez

Luis Ramirez 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).

  • Disk drive with textured slider contact region
    Patent number: 6205002
    Abstract: A disk drive having a disk with a contact start/stop (CSS) region on which a slider can rest is described. The CSS region is divided into at least three zones with the inner and outer zones having a surface topography which is different from the surface topography of the middle zone. The middle zone of the CSS region may be textured with bumps having a lower average height, a lower average density and/or a different bump diameter. The middle zone may also be left untextured. The slider is maintained over the CSS region during spin up and/or spin down.
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: March 20, 2001
    Assignee: International Business Machines Corporation
    Inventors: Peter Michael Baumgart, Thomas Allen Gregory, Ulla Vasant Nayak, Thao Anh Nguyen, Michael Luis Ramirez, Andrew Ching Tam, Run-Han Wang
  • Carburetor for an internal combustion engine
    Patent number: 4430982
    Abstract: An improved flow-type carburetor for an internal combustion engine comprising an exhaust gas conduit and port for introducing exhaust gas into the area of the carburetor defined between the venturi and the throttle valve and two or more ports for introducing additional air into the area of the carburetor between the venturi and throttle valve.
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: February 14, 1984
    Assignee: Ramirez Development Corporation
    Inventor: Luis A. Ramirez Diaz