The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 1988
Filed:
Feb. 21, 1986
Richard Olsen, Littleton, MA (US);
Prime Computer, Inc., Natick, MA (US);
Abstract
An apparatus for controlling visual attributes associated with characters displayed on a video display screen including a video memory for storing multiple data words corresponding to screen character locations, an attribute memory associated with the video memory for storing visual attribute codes and an attribute propagation store associated with the attribute memory for controlling visual attribute code propagation. A latch controls writing into the attribute propagation memory, a control bit for controlling visual attribute code propagation. The apparatus also includes a video display generator and control logic responsive to the control bit for causing a predetermined attribute code to be propagated for a preselected number of screen character locations.