Granted Patent
Utility
US 4,448,060 · App. 06/353,456
Viscosity measurement using pressurized viscometer device
Inventor:
Peter Maruhnic
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Mar 1, 1982
Inventor
Peter Maruhnic
Assignee (at issue)
HRI
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.