Granted Patent
Utility
US 4,933,575 · App. 07/310,443
Electric circuit interchangeable between sequential and combination circuits
Inventor:
Akira Aso
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: Feb 14, 1989
Inventor
Akira Aso
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.