Granted Patent
Utility
US 5,216,628 · App. 07/732,818
Absolute value arithmetic circuit
Inventors:
Hideo Mizutani, Noritsugu Matsubishi, Yoshio Tokuno
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Jul 19, 1991
Inventors
Hideo Mizutani
Noritsugu Matsubishi
Yoshio Tokuno
Assignee (at issue)
OKI ELECTRIC INDUSTRY CO., 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.