Granted Patent
Utility
US 4,457,085 · App. 06/445,152
Excavating buckets
Inventor:
Carroll H. Arnold
Patented Case
View Patent ↗
Granted: Jul 3, 1984
Filed: Nov 29, 1982
Inventor
Carroll H. Arnold
Assignee (at issue)
Wain-Roy Holding, 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.