Granted Patent
Utility
US 6,422,721 · App. 09/575,504
Tube guard system
Inventors:
Carlton Plunk, Mike Miller
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: May 22, 2000
Inventors
Carlton Plunk
Mike Miller
Assignee (at issue)
GENLYTE THOMAS GROUP, LLC
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.