Patents by Inventor Duane C. Meulners

Duane C. Meulners 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).

  • Fine positioning apparatus for floppy disk drive
    Patent number: 4630145
    Abstract: A positioning system for a magnetic disk storage system. A first and second lead screw connected to their respective stepper motors are mechanically connected by a lever arm that adds these motions. The first stepper motor is controlled by an open loop control circuit and the second stepper motor is controlled by a closed loop circuit that reads servo information off the magnetic disk. The head is constantly repositioned to follow track eccentricities and can accurately read very closely spaced tracks on non-rigid disks.
    Type: Grant
    Filed: June 20, 1984
    Date of Patent: December 16, 1986
    Assignee: Drivetec, Inc.
    Inventors: Herbert E. Thompson, Duane C. Meulners
  • Diagnostic recording
    Patent number: 4513333
    Abstract: A diagnostic recording, readable by a computer system for enabling a user without special knowledge, software, or equipment to check, isolate and identify hardware malfunctions within the system, has a track with magnetic signals recorded thereon that is centered within a normal track space. A pair of void spaces of equal width remain within the normal track space on opposite sides of the track and extend parallel thereto. The track and the adjacent void spaces have special widths for diagnostic purposes.
    Type: Grant
    Filed: March 2, 1984
    Date of Patent: April 23, 1985
    Assignee: Dymek Corporation
    Inventors: Ronald E. Young, Duane C. Meulners