Granted Patent
Utility
US 5,552,234 · App. 08/217,263
Copper foil for printed circuits
Inventor:
Yoshio Kawasumi
Patented Case
View Patent ↗
Granted: Sep 3, 1996
Filed: Mar 24, 1994
Inventor
Yoshio Kawasumi
Assignee (at issue)
Japan Energy 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.