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. 19, 1989
Filed:
Oct. 13, 1988
Ken-ichiroh Takahashi, Katano, JP;
Ritsuo Inaba, Neyagawa, JP;
Nobukazu Sugano, Suita, JP;
Horiyuki Harao, Ikoma, JP;
Yukihiro Matsuyama, Hirakata, JP;
Hiromi Tanoue, Kadoma, JP;
Toru Kishi, Yamatokouriyama, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
In a driving apparatus for ultrasonic motor, a variable oscillator (44) varies oscillating frequency responding to current level of detected current which flows to a piezoelectric member (1, 2) and is in proportion to mechanical vibration of the piezoelectric member (1, 2) when mechanical resonance frequency varies by change of environmental condition.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile