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:
Jun. 07, 2011
Filed:
Apr. 26, 2007
Applicants:
Yoshikazu Kawano, Hitachinaka, JP;
Nobuhiro Takano, Hitachinaka, JP;
Shinji Watanabe, Hitachinaka, JP;
Hiroyuki Hanawa, Hitachinaka, JP;
Inventors:
Yoshikazu Kawano, Hitachinaka, JP;
Nobuhiro Takano, Hitachinaka, JP;
Shinji Watanabe, Hitachinaka, JP;
Hiroyuki Hanawa, Hitachinaka, JP;
Assignee:
Hitachi Koki Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 7/00 (2006.01); H01J 7/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
Abnormal detecting meansfor detecting that an electrically conductive foreign substance has migrated into a charging deviceis provided, and whether or the foreign substance has migrated is judged from the detection result of the abnormal detecting means