Granted Patent
Utility
US 6,568,557 · App. 09/803,844
Spill proof training cup
Inventors:
Michael Fusco, William St. Pierre
Patented Case
View Patent ↗
Granted: May 27, 2003
Filed: Mar 12, 2001
Inventors
Michael Fusco
William St. Pierre
Assignee (at issue)
Cosco Management, 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.