Granted Patent
Utility
US 4,834,249 · App. 07/047,195
Oscillation suppressor for self-leveling boom
Inventor:
Dennis Dahl
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: May 7, 1987
Inventor
Dennis Dahl
Assignee (at issue)
CLARK EQUIPMENT COMPANY
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.