Granted Patent
Utility
US 4,967,894 · App. 07/320,017
Retractable roller system with removable carrier
Inventor:
Kees W. Thunnissen
Patented Case
View Patent ↗
Granted: Nov 6, 1990
Filed: Mar 7, 1989
Inventor
Kees W. Thunnissen
Assignee (at issue)
Ancra International LLC
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.