Granted Patent
Utility
US 5,186,289 · App. 07/604,758
Retractable lifeline safety device
Inventors:
James T. Wolner, Duncan C. Engh
Patented Case
View Patent ↗
Granted: Feb 16, 1993
Filed: Oct 26, 1990
Inventors
James T. Wolner
Duncan C. Engh
Assignee (at issue)
D B Industries, LLC
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.