Granted Patent
Utility
US 5,212,420 · App. 07/754,477
Method and apparatus for surface acoustic wave reflector grating
Inventors:
Thomas S. Hickernell, David Penunuri, Frederick Y. Cho
Patented Case
View Patent ↗
Granted: May 18, 1993
Filed: Sep 3, 1991
Inventors
Thomas S. Hickernell
David Penunuri
Frederick Y. Cho
Assignee (at issue)
Motorola, 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.