Abstract: Disclosed is a page printing system which uses virtual (logical) memory for mapping images. Physical memory which is used for creating a page image bitmap for synthetic graphics is to be allocated as patches. A path in general corresponds to a rectangular area of a page when the page exists in bitmap form. Each patch is represented by a set of non-contiguous segments of logical memory which, when mapped to physical memory, are contiguous.
January 22, 1988
Date of Patent:
July 17, 1990
Jeffrey H. Hoel, Eduardo D. Martinez, Jacobo Valdes
Abstract: Disclosed is a computer method and apparatus that permits identical copies of encrypted computer software (including a number of software elements) to be distributed to many users while retaining central control over which elements are "unlocked", that is, are authorized for use by each user.