Granted Patent
Utility
US 6,504,164 · App. 09/740,662
Electron beam apparatus
Inventors:
Akira Yonezawa, Seiji Morita, Mitsuyoshi Satou
Patented Case
View Patent ↗
Granted: Jan 7, 2003
Filed: Dec 19, 2000
Inventors
Akira Yonezawa
Seiji Morita
Mitsuyoshi Satou
Assignee (at issue)
SEIKO INSTRUMENTS INC.
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.