Granted Patent
Utility
US 5,804,971 · App. 08/609,176
Modular card based meter
Inventors:
Colin J. Cumming, Philip M. Maltby
Patented Case
View Patent ↗
Granted: Sep 8, 1998
Filed: Mar 1, 1996
Inventors
Colin J. Cumming
Philip M. Maltby
Assignee (at issue)
Nomadics, Inc.
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.