Granted Patent
Utility
US 5,234,548 · App. 07/815,977
Production of paper and paperboard
Inventor:
William Hatton
Patented Case
View Patent ↗
Granted: Aug 10, 1993
Filed: Jan 2, 1992
Inventor
William Hatton
Assignee (at issue)
Vinings Industries, 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.