Granted Patent
Utility
US 4,278,379 · App. 06/064,971
Bale wagon
Inventor:
Donald M. Grey
Patented Case
View Patent ↗
Granted: Jul 14, 1981
Filed: Aug 8, 1979
Inventor
Donald M. Grey
Assignee (at issue)
Sperry Corp.
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.