Granted Patent
Utility
US 6,278,656 · App. 09/389,690
Manipulation of acoustic waves using a functionally graded material and process for making the same
Inventors:
Vineet Tyagi, David Tinch
Patented Case
View Patent ↗
Granted: Aug 21, 2001
Filed: Sep 2, 1999
Inventors
Vineet Tyagi
David Tinch
Assignee (at issue)
LightPath Technologies, 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.