Title:
Sound Fresnel's lens and a manufacturing method for the same
Document Type and Number:
Japanese Patent JP6123825
Kind Code:
B2
Inventors:
Shingo Katayama
Ryuta Iijima
Kurahashi Yoshinori
Ryuta Iijima
Kurahashi Yoshinori
Application Number:
JP2015039023A
Publication Date:
May 10, 2017
Filing Date:
February 27, 2015
Export Citation:
Assignee:
Brother Industries, Ltd.
International Classes:
G10K11/30; G02B3/08; H04R17/00; H04R31/00
Domestic Patent References:
| JP5277106A | ||||
| JP5277105A | ||||
| JP62087151A |
Attorney, Agent or Firm:
Hisashi Yamamoto
Tamami Takada
Tamami Takada