Granted Patent
Utility
US 5,547,089 · App. 08/308,604
Slackless drawbar assembly utilizing a ball and race assembly
Inventors:
David W. Daugherty Jr., Wajih Kanjo, Michael G. Hawryszkow
Patented Case
View Patent ↗
Granted: Aug 20, 1996
Filed: Sep 19, 1994
Inventors
David W. Daugherty Jr.
Wajih Kanjo
Michael G. Hawryszkow
Assignee (at issue)
Westinghouse Air Brake Co.
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.