Granted Patent
Utility
US 4,435,801 · App. 06/363,790
Information record with a thick overcoat
Inventor:
Leonard Levin
Patented Case
View Patent ↗
Granted: Mar 6, 1984
Filed: Mar 31, 1982
Inventor
Leonard Levin
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.