Granted Patent
Utility
US 4,649,392 · App. 06/460,216
Two dimensional transform utilizing ultrasonic dispersive delay line
Inventor:
John T. Apostolos
Patented Case
View Patent ↗
Granted: Mar 10, 1987
Filed: Jan 24, 1983
Inventor
John T. Apostolos
Assignee (at issue)
Sanders GmbH
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.