Granted Patent
Utility
US 5,009,721 · App. 07/388,381
Solar cell
Inventors:
Hideo Matsumoto, Shigeru Hokuyo
Patented Case
View Patent ↗
Granted: Apr 23, 1991
Filed: Aug 2, 1989
Inventors
Hideo Matsumoto
Shigeru Hokuyo
Assignee (at issue)
MITSUBISHI ELECTRIC 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.