Granted Patent
Utility
US 4,604,891 · App. 06/661,806
Reference pressure devices for calibrating pressure-measuring instruments
Inventors:
George E. Sgourakes, John Angelosanto, Barry T. Malloy
Patented Case
View Patent ↗
Granted: Aug 12, 1986
Filed: Oct 17, 1984
Inventors
George E. Sgourakes
John Angelosanto
Barry T. Malloy
Assignee (at issue)
Fox Boro Company
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.