Granted Patent
Utility
US 4,266,287 · App. 06/030,204
Transducer systems with controlled damping
Inventors:
Ebbert L. Elswood, Wyndall O. Reynolds
Patented Case
View Patent ↗
Granted: May 5, 1981
Filed: Apr 16, 1979
Inventors
Ebbert L. Elswood
Wyndall O. Reynolds
Assignee (at issue)
Bell and Howell, LLC
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.