Granted Patent
Utility
US 6,135,657 · App. 09/285,741
Ribbon cassette with coaxial spools on common shaft with partition for preventing contamination
Inventors:
Phillip M. Martinez, Scott J. Longrod
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Apr 5, 1999
Inventors
Phillip M. Martinez
Scott J. Longrod
Assignee (at issue)
Axiohm Transaction Solutions, 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.