Granted Patent
Utility
US 4,740,218 · App. 06/873,721
Blast cleaning machine and conveyor therefor
Inventors:
James C. Hensley, A. Lee Bussard, Jr.
Patented Case
View Patent ↗
Granted: Apr 26, 1988
Filed: Jun 12, 1986
Inventors
James C. Hensley
A. Lee Bussard, Jr.
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.