Granted Patent
Utility
US 6,422,457 · App. 09/507,614
Access device for a materials depository
Inventors:
Mark R. Frich, Richard H. Jackson
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Feb 21, 2000
Inventors
Mark R. Frich
Richard H. Jackson
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.