Granted Patent
Utility
US 5,195,573 · App. 07/568,552
Continuous rail production
Inventors:
Robert L. Cryderman, John C. Winkley
Patented Case
View Patent ↗
Granted: Mar 23, 1993
Filed: Oct 15, 1990
Inventors
Robert L. Cryderman
John C. Winkley
Assignee (at issue)
CF&I Steel
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.