Assignors: FUKUI, YOSHIKI, MIYAZAKI, SHINICHI, MATSUZAWA, KINYA, SEKINO, HIROKAZU Publication of US20080013761A1 publication Critical patent/US20080013761A1/en Application granted granted Critical Publication of US7881489B2 publication Critical patent/US7881489B2/en Status Expired - Fee Related legal-status Critical Current Adjusted expiration legal-status Critical Links Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority claimed from JP2004-175471 external-priority Application filed by Seiko Epson Corp filed Critical Seiko Epson Corp Assigned to SEIKO EPSON CORPORATION reassignment SEIKO EPSON CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Original Assignee Seiko Epson Corp Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ( en Inventor Kinya Matsuzawa Hirokazu Sekino Yoshiki Fukui Shinichi Miyazaki Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related, expires Application number US11/629,248 Other versions US20080013761A1 Google Patents Ultrasonic transducer and ultrasonic speaker using the sameĭownload PDF Info Publication number US7881489B2 US7881489B2 US11/629,248 US62924805A US7881489B2 US 7881489 B2 US7881489 B2 US 7881489B2 US 62924805 A US62924805 A US 62924805A US 7881489 B2 US7881489 B2 US 7881489B2 Authority US United States Prior art keywords fixed electrode electrode ultrasonic transducer ultrasonic ultrasonic speaker Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
Google Patents US7881489B2 - Ultrasonic transducer and ultrasonic speaker using the same
US7881489B2 - Ultrasonic transducer and ultrasonic speaker using the same
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