Granted Patent
Utility
US 4,313,828 · App. 06/023,954
High pressure tubing coupler
Inventor:
Robert Brownlee
Patented Case
View Patent ↗
Granted: Feb 2, 1982
Filed: Mar 26, 1979
Inventor
Robert Brownlee
Assignee (at issue)
Brownlee Labs, 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.