Granted Patent
Utility
US 6,520,859 · App. 09/749,251
Universal joint bearing insert formed from ceramic or composite materials
Inventors:
Daniel E. Beitzel, Scott A. Dunn
Patented Case
View Patent ↗
Granted: Feb 18, 2003
Filed: Dec 27, 2000
Inventors
Daniel E. Beitzel
Scott A. Dunn
Assignee (at issue)
Spicer Driveshaft, Inc.
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.