Granted Patent
Utility
US 4,991,444 · App. 07/509,923
Centrifugal carton test method and apparatus
Inventor:
Clayton Dodd
Patented Case
View Patent ↗
Granted: Feb 12, 1991
Filed: Apr 16, 1990
Inventor
Clayton Dodd
Assignee (at issue)
Manville Corporation
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.