Granted Patent
Utility
US 4,423,796 · App. 06/444,047
Ladder climber's safety device
Inventors:
Andrew C. Sulowski, Henry E. Skelton
Patented Case
View Patent ↗
Granted: Jan 3, 1984
Filed: Nov 23, 1982
Inventors
Andrew C. Sulowski
Henry E. Skelton
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.