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:
Dec. 03, 2013
Filed:
Jul. 19, 2010
Toshiaki Nakayama, Nishikamo-gun, JP;
Toshio Hayashi, Obu, JP;
Toshiaki Nakayama, Nishikamo-gun, JP;
Toshio Hayashi, Obu, JP;
Denso Corporation, Kariya, Aichi-Pref., JP;
Abstract
A vehicle existence informing device is configured to inform existence of a vehicle by using a warning sound at a frequency in an audible range. A speaker array includes at least two speakers arranged so that oscillation directions of oscillators of the at least two speakers substantially coincide with each other. The speaker array is configured to radiate a warning sound in air on a carrier wave, which is at a frequency in an ultrasonic range. A phase control unit is configured to advance and delay a phase of a sound wave radiated from one of the at least two speakers with respect to a phase of a sound wave radiated from another of the at least two speakers.