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:
Mar. 08, 2011
Filed:
Sep. 21, 2006
Applicants:
Yoshiyuki Yamamoto, Itami, JP;
Natsuo Tatsumi, Itami, JP;
Yoshiki Nishibayashi, Itami, JP;
Takahiro Imai, Itami, JP;
Inventors:
Yoshiyuki Yamamoto, Itami, JP;
Natsuo Tatsumi, Itami, JP;
Yoshiki Nishibayashi, Itami, JP;
Takahiro Imai, Itami, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 1/304 (2006.01);
U.S. Cl.
CPC ...
Abstract
An electron emitting devicecomprises an electron emitting portionmade of diamond. At an electron emission current value of 10 μA or more, a deviation of the electron emission current value over one hour is within ±20% in the electron emitting deviceThe number of occurrence of step-like noise changing the electron emission current value stepwise is once or less per 10 minutes.