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:
Feb. 10, 2009
Filed:
Feb. 07, 2006
Applicants:
Minoru Sekine, Tokyo, JP;
Masaaki Ohira, Fukushima, JP;
Inventors:
Minoru Sekine, Tokyo, JP;
Masaaki Ohira, Fukushima, JP;
Assignee:
Alpine Electronics, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of generating map update process data used for updating old map data including a great number of files to new map data includes the steps of using an old map file to be updated and a new map file to generate differential data; calculating a relative size of the differential data; and using the new map file if the relative size is higher than a predetermined value and using the differential data if the relative size is lower than the predetermined value to form the map update process data.