Granted Patent
Utility
US 4,633,117 · App. 06/645,769
Slanted and chirped surface acoustic wave devices
Inventors:
Paul Bloch, Michael E. Barnard, Edward G. S. Paige
Patented Case
View Patent ↗
Granted: Dec 30, 1986
Filed: Aug 30, 1984
Inventors
Paul Bloch
Michael E. Barnard
Edward G. S. Paige
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT 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.