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:
Sep. 14, 1999
Filed:
Dec. 05, 1996
Applicant:
Inventors:
Toshitada Doi, Kanagawa, JP;
Makoto Ishii, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
707100 ; 707200 ; 707201 ; 705 37 ; 705401 ; 705409 ;
Abstract
A method and apparatus for improving the efficiency of providing updated data over a transmission medium. Each data has associated information indicating the presence or absence of validity data. An absence of validity data indicates that the data does not need to be updated. The presence of validity data allows only that data which needs updating to be transferred on the transmission medium, thereby improving its performance.