Granted Patent
Utility
US 5,974,504 · App. 09/116,020
Metal token having units of value stored therein using a single wire communication method
Inventors:
Robert D. Lee, Stephen M. Curry, Michael L. Bolan, Hal Kurkowski, Donald R. Diaz, Francis A. Scherpenberg, Kevin E. Peirling
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: Jul 15, 1998
Inventors
Robert D. Lee
Stephen M. Curry
Michael L. Bolan
Hal Kurkowski
Donald R. Diaz
Francis A. Scherpenberg
Kevin E. Peirling
Assignee (at issue)
Dallas Semiconductor 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.