Granted Patent
Utility
US 4,609,890 · App. 06/666,044
Bulk acoustic wave signal processing devices
Inventors:
Daniel E. Oates, Peter V. Wright
Patented Case
View Patent ↗
Granted: Sep 2, 1986
Filed: Oct 29, 1984
Inventors
Daniel E. Oates
Peter V. Wright
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.