Granted Patent
Utility
US 6,487,272 · App. 09/498,370
Penetrating type X-ray tube and manufacturing method thereof
Inventor:
Hiroki Kutsuzawa
Patented Case
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Granted: Nov 26, 2002
Filed: Feb 4, 2000
Inventor
Hiroki Kutsuzawa
Assignee (at issue)
Kabushiki Kaisha Toshiba
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.