Granted Patent
Utility
US 4,673,952 · App. 06/621,395
Driving device for a thermal element
Inventor:
Youichi Setoyama
Patented Case
View Patent ↗
Granted: Jun 16, 1987
Filed: Jun 18, 1984
Inventor
Youichi Setoyama
Assignee (at issue)
NEC 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.