Granted Patent
Utility
US 4,837,068 · App. 07/006,840
Compliant diaphragm material
Inventors:
John R. Martin, Richard A. Anderson
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Jan 27, 1987
Inventors
John R. Martin
Richard A. Anderson
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.