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:
Jun. 05, 2001
Filed:
Sep. 16, 1998
Applicant:
Inventors:
Mitsuteru Kataoka, Fujisawa, JP;
Takenosuke Harada, Yokohama, JP;
Kazuhiro Machida, Inzai, JP;
Isao Masuda, Setagays, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N 7/167 ;
U.S. Cl.
CPC ...
H04N 7/167 ;
Abstract
The present invention provides an information transmission apparatus and method for an information transmission system where encrypted information comprised of a plurality of information units each hierarchically encrypted and multiplexed to each other is communicated between at least two parties, wherein the information is being encrypted for transmission. The information transmission system is constructed by a transmitting unit and a receiving unit.