Patents by Inventor Harry B. Mendell

Harry B. Mendell 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).

  • Memory management arrangement for microprocessor systems
    Patent number: 4519032
    Abstract: A memory management system is structured for use with a self-contained microprocessor to form a multi-user computer. The system operates to establish user and kernel modes each having different operating permissions. When the system is operating in the user mode, certain of the fixed functions of the microprocessor, such as interrupt-off and halt, are blocked from enablement by any user. The system is designed having multiple memory maps, some accessible when in the user mode and all accessible from the kernel mode.
    Type: Grant
    Filed: June 9, 1982
    Date of Patent: May 21, 1985
    Assignee: AT&T Bell Laboratories
    Inventor: Harry B. Mendell