Granted Patent
Utility
US 5,285,499 · App. 08/052,986
Ultrasonic frequency expansion processor
Inventors:
Dorothy A. Shannon, John Paul King, Joseph T. DeWitte, Jr., James D. Orndorff
Patented Case
View Patent ↗
Granted: Feb 8, 1994
Filed: Apr 27, 1993
Inventors
Dorothy A. Shannon
John Paul King
Joseph T. DeWitte, Jr.
James D. Orndorff
Assignee (at issue)
Signal Sciences Corporation
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.