Patents by Inventor Wolfgang Speigelstein

Wolfgang Speigelstein 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).

  • Drive for end loading and transversely shifting tape cartridge
    Patent number: RE33224
    Abstract: A cartridge drive adapted for endwise loading of tape cartridges has a retractable friction roll to open the tape access door as the cartridge is loaded into the drive. A pivoted cartridge carriage swings the loaded cartridge across the loading path of travel to an operative position in engagement with the drive motor and magnetic head of the drive. In preferred forms, the drive is dimensioned to fit within the "foot print" of a standard 51/4" floppy disk drive.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: May 29, 1990
    Assignee: Irwin Magnetic Systems, Inc.
    Inventor: Wolfgang Speigelstein