Granted Patent
Utility
US 6,453,623 · App. 09/490,119
Roof snow barrier
Inventors:
Robin Nelson, Jiri Krupka, Steven Paul Guenette, Dave Gerwing, Colin Fabian
Patented Case
View Patent ↗
Granted: Sep 24, 2002
Filed: Jan 24, 2000
Inventors
Robin Nelson
Jiri Krupka
Steven Paul Guenette
Dave Gerwing
Colin Fabian
Assignee (at issue)
Roofers - Annex 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.