Granted Patent
Utility
US 4,236,823 · App. 06/016,110
Diffractometer for measuring signal depth and width
Inventors:
William R. Roach, Ping Sheng
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: Feb 28, 1979
Inventors
William R. Roach
Ping Sheng
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.