Granted Patent
Utility
US 6,798,792 · App. 09/888,500
Laser device and light signal amplifying device using the same
Inventor:
Katsuhisa Itoh
Patented Case
View Patent ↗
Granted: Sep 28, 2004
Filed: Jun 26, 2001
Inventor
Katsuhisa Itoh
Assignee (at issue)
HOYA CORPORATION
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.