Granted Patent
Utility
US 5,603,135 · App. 08/550,949
Pool cleaner with replaceable mast
Inventors:
Robert E. Jones, Sanford F. Campbell
Patented Case
View Patent ↗
Granted: Feb 18, 1997
Filed: Oct 31, 1995
Inventors
Robert E. Jones
Sanford F. Campbell
Assignee (at issue)
Letro 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.