Granted Patent
Utility
US 4,493,778 · App. 06/397,986
Water-based magnetic coating composition
Inventor:
Sikandar Iqbal
Patented Case
View Patent ↗
Granted: Jan 15, 1985
Filed: Jul 14, 1982
Inventor
Sikandar Iqbal
Assignee (at issue)
Memorex 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.