Granted Patent
Utility
US 4,828,077 · App. 07/158,409
Solenoid and spring operated brake
Inventor:
Howard C. Stevens Jr.
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: Feb 22, 1988
Inventor
Howard C. Stevens Jr.
Assignee (at issue)
Lift-Tech 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.