Granted Patent
Utility
US 4,333,065 · App. 06/195,587
Low reflectivity apodized surface acoustic transducer with means to prevent wavefront distortion
Inventor:
Adrian J. DeVries
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: Oct 9, 1980
Inventor
Adrian J. DeVries
Assignee (at issue)
Zenith Radio 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.