Granted Patent
Utility
US 6,554,491 · App. 09/740,610
Optical module
Inventors:
Hideo Sotokawa, Toshimasa Miura
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Dec 18, 2000
Inventors
Hideo Sotokawa
Toshimasa Miura
Assignee (at issue)
HITACHI, LTD.
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.