Granted Patent
Utility
US 6,170,612 · App. 09/337,781
Swimming pool lift
Inventor:
Keith Krumbeck
Patented Case
View Patent ↗
Granted: Jan 9, 2001
Filed: Jun 22, 1999
Inventor
Keith Krumbeck
Assignee (at issue)
Spectrum Distributors, 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.