Granted Patent
Utility
US 5,933,899 · App. 09/108,283
Low pressure automatic swimming pool cleaner
Inventors:
Sanford F. Campbell, Bret Martin
Patented Case
View Patent ↗
Granted: Aug 10, 1999
Filed: Jul 1, 1998
Inventors
Sanford F. Campbell
Bret Martin
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.