Granted Patent
Utility
US 6,752,097 · App. 10/319,037
Unitary plastic boat lift buoyancy tank
Inventors:
Todd A. Elson, David Lance Waltrip
Patented Case
View Patent ↗
Granted: Jun 22, 2004
Filed: Dec 13, 2002
Inventors
Todd A. Elson
David Lance Waltrip
Assignee (at issue)
Hydro Hoist International, 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.