Granted Patent
Utility
US 5,947,049 · App. 08/892,479
Buoyant walkway module for a boatlift
Inventor:
Todd A. Elson
Patented Case
View Patent ↗
Granted: Sep 7, 1999
Filed: Jul 14, 1997
Inventor
Todd A. Elson
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.