Granted Patent
Utility
US 4,558,498 · App. 06/548,874
Process for the manufacture of solenoid operated valve
Inventor:
Yuji Satoh
Patented Case
View Patent ↗
Granted: Dec 17, 1985
Filed: Nov 4, 1983
Inventor
Yuji Satoh
Assignee (at issue)
Diesel Kiki 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.