Granted Patent
Utility
US 4,313,087 · App. 06/119,511
Apparatus for detecting electrically conductive coatings on documents
Inventors:
Edward H. Weitzen, Salvatore F. D'Amato
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Feb 7, 1980
Inventors
Edward H. Weitzen
Salvatore F. D'Amato
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.