Granted Patent
Utility
US 4,805,546 · App. 07/148,161
Retractable water board fin
Inventors:
Douglas A. Geller, Stephen E. Schneider, William C. Holbrook
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Feb 1, 1988
Inventors
Douglas A. Geller
Stephen E. Schneider
William C. Holbrook
Assignee (at issue)
Kransco Manufacturing, 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.