Granted Patent
Utility
US 4,819,487 · App. 07/054,747
High pressure transducer
Inventor:
William Wareham
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: May 28, 1987
Inventor
William Wareham
Assignee (at issue)
Dynisco, 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.