Granted Patent
Utility
US 6,443,317 · App. 09/810,285
Conversion tower display system
Inventor:
Emory Brozak
Patented Case
View Patent ↗
Granted: Sep 3, 2002
Filed: Mar 16, 2001
Inventor
Emory Brozak
Assignee (at issue)
American Greetings 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.