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:
May. 28, 2013
Filed:
Jan. 21, 2011
Toshiaki Nakayama, Miyoshi, JP;
Toshiaki Nakayama, Miyoshi, JP;
Denso Corporation, Kariya, Aichi-Pref., JP;
Abstract
A vehicle presence notification apparatus notifies a presence of a vehicle by providing easily-perceivable and less uncomfortable notification sound outside of the vehicle. The vehicle presence notification apparatus includes: a speaker and a controller. The controller is configured to cause the speaker to generate the notification sound that simultaneously has (i) at least one fundamental high frequency, which is easily perceivable, but annoying to human ears; and (ii) at least one auxiliary low frequency, which is less than the at least one fundamental high frequency and has a harmonic relation with the at least one fundamental high frequency.