Granted Patent
Utility
US 6,619,639 · App. 10/037,333
Low fiction rotating bushing, particularly for heavy vehicle lift axle
Inventors:
Bert C. Shelley, Keith W. Meyer
Patented Case
View Patent ↗
Granted: Sep 16, 2003
Filed: Dec 21, 2001
Inventors
Bert C. Shelley
Keith W. Meyer
Assignee (at issue)
ATRO Engineered Systems, 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.