Granted Patent
Utility
US 5,305,694 · App. 08/079,102
Sideframe with increased fatigue life having longer cross-sectional thickness transition zone
Inventors:
Robert D. Wronkiewicz, Franklin S. McKeown, Jr.
Patented Case
View Patent ↗
Granted: Apr 26, 1994
Filed: Jun 17, 1993
Inventors
Robert D. Wronkiewicz
Franklin S. McKeown, Jr.
Assignee (at issue)
AMSTED INDUSTRIES INCORPORATED
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.