Granted Patent
Utility
US 5,586,579 · App. 08/559,752
Combination ball valve and pressure relief valve assembly
Inventor:
Matthew D. Diehl
Patented Case
View Patent ↗
Granted: Dec 24, 1996
Filed: Nov 15, 1995
Inventor
Matthew D. Diehl
Assignee (at issue)
LOCKHEED MARTIN 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.