Granted Patent
Utility
US 4,284,368 · App. 06/004,429
Vehicle with dual drill booms and temporary roof support
Inventor:
Charles D. Albright
Patented Case
View Patent ↗
Granted: Aug 18, 1981
Filed: Jan 18, 1979
Inventor
Charles D. Albright
Assignee (at issue)
FMC 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.