Granted Patent
Utility
US 5,901,720 · App. 08/918,464
Apparatus for applying fluids to vertical surfaces nonmanually and performing other nonmanual tasks adjacent vertical surfaces
Inventor:
Michael R. Lange
Patented Case
View Patent ↗
Granted: May 11, 1999
Filed: Aug 26, 1997
Inventor
Michael R. Lange
Assignee (at issue)
Sky Robotics, 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.