Granted Patent
Utility
US 4,333,350 · App. 06/145,396
Differential pressure sensing device
Inventor:
James Gibb
Patented Case
View Patent ↗
Granted: Jun 8, 1982
Filed: May 1, 1980
Inventor
James Gibb
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.