Granted Patent
Utility
US 4,295,287 · App. 06/139,037
Backhoe bucket quick coupler
Inventors:
Ronald C. Natzke, Thomas R. Brown
Patented Case
View Patent ↗
Granted: Oct 20, 1981
Filed: Apr 10, 1980
Inventors
Ronald C. Natzke
Thomas R. Brown
Assignee (at issue)
J. I. Case 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.