Granted Patent
Utility
US 4,896,027 · App. 07/311,442
Portable detachable data record
Inventor:
Jerome Drexler
Patented Case
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Granted: Jan 23, 1990
Filed: Feb 14, 1989
Inventor
Jerome Drexler
Assignee (at issue)
Drexler Technology 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.