Granted Patent
Utility
US 5,996,597 · App. 09/083,996
Portable drain cleaning apparatus and pressurized gas cartridge usable therewith
Inventor:
Charles Gallo
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: May 26, 1998
Inventor
Charles Gallo
Assignee (at issue)
CDC Products, 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.