Granted Patent
Utility
US 4,603,485 · App. 06/778,788
Leveling apparatus
Inventor:
Lyle D. Ostby
Patented Case
View Patent ↗
Granted: Aug 5, 1986
Filed: Sep 23, 1985
Inventor
Lyle D. Ostby
Assignee (at issue)
Kearney & Trecker Corporation
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.