Granted Patent
Utility
US 4,587,974 · App. 06/670,213
Linear pressurizing and depressurizing device
Inventor:
William T. Link
Patented Case
View Patent ↗
Granted: May 13, 1986
Filed: Nov 13, 1984
Inventor
William T. Link
Assignee (at issue)
Norse Instruments
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.