Granted Patent
Utility
US 6,424,492 · App. 09/556,534
Frequency based cartridge detection system
Inventors:
Robert D. Allgood, Paul Smith, Fred Charles Thomas, III
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Apr 24, 2000
Inventors
Robert D. Allgood
Paul Smith
Fred Charles Thomas, III
Assignee (at issue)
IO-Mega Holding 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.