Granted Patent
Utility
US 6,544,448 · App. 09/779,533
Two-part coated foam structure
Inventor:
Steven Hartman
Patented Case
View Patent ↗
Granted: Apr 8, 2003
Filed: Feb 9, 2001
Inventor
Steven Hartman
Assignee (at issue)
Industrial Thermo Polymers Limited
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.