Granted Patent
Utility
US 6,262,517 · App. 09/502,584
Pressure resistant piezoelectric acoustic sensor
Inventors:
Gerald SCHMIDT, Leslie J. Bowen
Patented Case
View Patent ↗
Granted: Jul 17, 2001
Filed: Feb 11, 2000
Inventors
Gerald SCHMIDT
Leslie J. Bowen
Assignee (at issue)
Materials Systems, 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.