Granted Patent
Utility
US 4,779,901 · App. 07/005,397
Sealed rigid pipe joint
Inventor:
Horace P. Halling
Patented Case
View Patent ↗
Granted: Oct 25, 1988
Filed: Jan 9, 1987
Inventor
Horace P. Halling
Assignee (at issue)
EG&G Pressure Science, 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.