Granted Patent
Utility
US 4,765,174 · App. 07/017,298
Texture enhancement of metallic tubing material having a hexagonal close-packed crystal structure
Inventors:
Charles S. Cook, George P. Sabol
Patented Case
View Patent ↗
Granted: Aug 23, 1988
Filed: Feb 20, 1987
Inventors
Charles S. Cook
George P. Sabol
Assignee (at issue)
Westinghouse Electric Company LLC
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.