Granted Patent
Utility
US 4,733,752 · App. 07/073,108
Extensible ladder for boats
Inventor:
Robert Sklar
Patented Case
View Patent ↗
Granted: Mar 29, 1988
Filed: Jul 14, 1987
Inventor
Robert Sklar
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.