Granted Patent
Utility
US 4,790,894 · App. 07/046,515
Process for producing printed wiring board
Inventors:
Masaji Homma, Hitoshi Yamauchi
Patented Case
View Patent ↗
Granted: Dec 13, 1988
Filed: May 6, 1987
Inventors
Masaji Homma
Hitoshi Yamauchi
Assignee (at issue)
Hitachi, Condenser 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.