Granted Patent
Utility
US 5,667,154 · App. 08/683,010
Cast abrasion resistant hollow balls
Inventor:
Bryan Hand
Patented Case
View Patent ↗
Granted: Sep 16, 1997
Filed: Jul 16, 1996
Inventor
Bryan Hand
Assignee (at issue)
The Babcock & Wilcox 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.