Granted Patent
Utility
US 5,521,765 · App. 08/271,822
Electrically-conductive, contrast-selectable, contrast-improving filter
Inventor:
Jesse D. Wolfe
Patented Case
View Patent ↗
Granted: May 28, 1996
Filed: Jul 7, 1994
Inventor
Jesse D. Wolfe
Assignee (at issue)
The BOC Group Limited
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.