Granted Patent
Utility
US 6,447,377 · App. 09/975,904
Dry ice blasting gun with adjustable handle
Inventors:
Joel Londenberg, Alan E. Opel
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Oct 12, 2001
Inventors
Joel Londenberg
Alan E. Opel
Assignee (at issue)
CAE Alpheus, 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.