Granted Patent
Utility
US 4,986,808 · App. 07/287,748
Magnetostrictive transducer
Inventors:
Alan Broadwin, Leonard M. Emery
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Dec 20, 1988
Inventors
Alan Broadwin
Leonard M. Emery
Assignee (at issue)
Valleylab, 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.