Granted Patent
Utility
US 5,188,719 · App. 07/757,643
Electrolytic processing system
Inventors:
Masaaki Akanuma, Akira Hasegawa
Patented Case
View Patent ↗
Granted: Feb 23, 1993
Filed: Sep 11, 1991
Inventors
Masaaki Akanuma
Akira Hasegawa
Assignee (at issue)
Yoshida Kogyo K.K.
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.