Granted Patent
Utility
US 6,017,208 · App. 08/864,487
Chain driven roller system for use in concrete pipe manufacturing
Inventor:
Frederick Schultz
Patented Case
View Patent ↗
Granted: Jan 25, 2000
Filed: May 28, 1997
Inventor
Frederick Schultz
Assignee (at issue)
Concrete Technology Integrators, 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.