Granted Patent
Utility
US 5,559,885 · App. 08/200,779
Two stage read-write method for transaction cards
Inventors:
Jerome Drexler, Christopher J. Dyball
Patented Case
View Patent ↗
Granted: Sep 24, 1996
Filed: Feb 22, 1994
Inventors
Jerome Drexler
Christopher J. Dyball
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.