Granted Patent
Utility
US 4,597,410 · App. 06/771,218
Cross line relief valve mechanism
Inventor:
Raud A. Wilke
Patented Case
View Patent ↗
Granted: Jul 1, 1986
Filed: Aug 30, 1985
Inventor
Raud A. Wilke
Assignee (at issue)
HUSCO International, Inc.
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.