Granted Patent
Utility
US 4,326,553 · App. 06/181,985
Megasonic jet cleaner apparatus
Inventor:
William B. Hall
Patented Case
View Patent ↗
Granted: Apr 27, 1982
Filed: Aug 28, 1980
Inventor
William B. Hall
Assignee (at issue)
RCA 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.