Granted Patent
Utility
US 4,903,941 · App. 07/239,117
Pressure equalizing rotary joint
Inventor:
Rene T. Nuytten
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Aug 30, 1988
Inventor
Rene T. Nuytten
Assignee (at issue)
International Hard Suits, 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.