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:
Oct. 30, 2012
Filed:
Jan. 23, 2008
Applicants:
Naoto Yamamoto, Utsunomiya, JP;
Hideaki Arai, Powell, OH (US);
Inventors:
Naoto Yamamoto, Utsunomiya, JP;
Hideaki Arai, Powell, OH (US);
Assignee:
Honda Motor Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 7/04 (2006.01); H04L 9/14 (2006.01); H04L 9/32 (2006.01); E05B 65/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a keyless entry system, a CPU in an ECU and a CPU in a remote control key each have an associated memory for storing respective function formulas, which are specified by primary function formula data. With this structure, function formulas used in the remote control key and the ECU can be changed to respective new function formulas. This technique makes it difficult to predict the function formulas used in the remote control key and the ECU, thereby further reducing any regularity of rolling codes generated by the function formulas.