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. 04, 2010
Filed:
Nov. 28, 2007
Toshiyuki Ogawa, Tokyo, JP;
Yoshitaka Zaitsu, Kawasaki, JP;
Takashi Ushijima, Yokohama, JP;
Atsushi Kandori, Ebina, JP;
Kaoru Noguchi, Tokyo, JP;
Kazuhiko Kato, Tokyo, JP;
Futoshi Hirose, Yokohama, JP;
Toshiyuki Ogawa, Tokyo, JP;
Yoshitaka Zaitsu, Kawasaki, JP;
Takashi Ushijima, Yokohama, JP;
Atsushi Kandori, Ebina, JP;
Kaoru Noguchi, Tokyo, JP;
Kazuhiko Kato, Tokyo, JP;
Futoshi Hirose, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A potential measurement apparatus is provided which can suitably maintain the oscillation state of an oscillator including a detection electrode and stably measure the potential of a measurement object. The potential measurement apparatus includes a bearing part, an elastic supporting part supported by the bearing part, an oscillator movably supported by the elastic supporting part, detection electrodes installed in the oscillator, a drive mechanism driving the oscillator and a signal detection unit. The signal detection unit is connected to the detection electrodes to detect electrical signals appearing in the detected electrodes. A stress detecting element for generating an electric signal according to the stress of the elastic suspension partis provided.