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:
Jan. 03, 1989
Filed:
Feb. 13, 1987
Applicant:
Inventor:
Ian D MacArthur, Stockport, GB;
Assignee:
International Computers Limited, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
380 14 ; 380 17 ; 380 18 ;
Abstract
A video display unit is described in which the display is divided into segments, and the order of scanning within each segment is scrambled. A segment may consist, for example, of a row or characters. The scrambling eliminates or reduces the risk of eavesdropping on electromagnetic radiation from the video signal.