Granted Patent
Utility
US 6,138,599 · App. 09/368,253
Buoyant walkway module for a boatlift
Inventor:
Todd A. Elson
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Aug 3, 1999
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.