Granted Patent
Utility
US 4,520,318 · App. 06/467,267
Electric field strength indicator
Inventors:
Marcel Hascal, Donald A. Watson, Andrew Danielski, Sergio Lopez
Patented Case
View Patent ↗
Granted: May 28, 1985
Filed: Feb 17, 1983
Inventors
Marcel Hascal
Donald A. Watson
Andrew Danielski
Sergio Lopez
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.