Granted Patent
Utility
US 6,037,589 · App. 09/008,161
Electron beam device
Inventors:
Akira Yonezawa, Mitsuyoshi Sato, Osamu Takaoka
Patented Case
View Patent ↗
Granted: Mar 14, 2000
Filed: Jan 16, 1998
Inventors
Akira Yonezawa
Mitsuyoshi Sato
Osamu Takaoka
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.