Granted Patent
Utility
US 5,909,930 · App. 08/906,793
Retractable blade utility knife having quick change feature
Inventors:
Howard Nicholas Ragland, James F. Mariol
Patented Case
View Patent ↗
Granted: Jun 8, 1999
Filed: Aug 5, 1997
Inventors
Howard Nicholas Ragland
James F. Mariol
Assignee (at issue)
Millers Falls Tool Company
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.