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. 11, 2004
Filed:
Jan. 06, 2003
Applicant:
Inventors:
Tadaoki Matsushita, Hamamatsu, JP;
Tutomu Inazuru, Hamamatsu, JP;
Assignee:
Hamamatsu Photonics K.K., Shizuoka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 3/514 ;
U.S. Cl.
CPC ...
H01J 3/514 ;
Abstract
An X-ray tube includes spacer which is cylindrical so it does not block electrons directed from a grid electrode toward a focusing electrode , and which has one end fixed to the grid electrode and the other end abutting against the focusing electrode . The distance between the grid electrode and focusing electrode is set to a predetermined distance by the spacer