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:
Apr. 11, 1995
Filed:
Dec. 28, 1992
Applicant:
Inventors:
John R Thompson, La Quinta, CA (US);
C J Hunting, Altadena, CA (US);
William L Phipps, Bermuda Dunes, CA (US);
Steven J Raynesford, Cathedral City, CA (US);
Philip H Rittmueller, St. Charles, IL (US);
Assignee:
NEC Home Electronics, Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
380 20 ; 380 44 ; 380 47 ;
Abstract
An audiovisual subscription system includes means for aperiodically inverting the lines of a transmitted video signal on a frame-by-frame basis and for decrypting encrypted PCM audio information which is transmitted along with the aperiodically inverted video information.
Thompson, John. (1995). Digital data cryptographic system (U.S. Patent No. 5406627). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5406627
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile