Granted Patent
Utility
US 6,739,220 · App. 10/218,404
Motorized light bulb changer
Inventors:
Ronald L. Johnson, Norio Sugano
Patented Case
View Patent ↗
Granted: May 25, 2004
Filed: Aug 12, 2002
Inventors
Ronald L. Johnson
Norio Sugano
Assignee (at issue)
Wagic, 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.