Granted Patent
Utility
US 4,927,661 · App. 06/767,028
Heat product
Inventors:
Noel J. Bradshaw, David Hughes
Patented Case
View Patent ↗
Granted: May 22, 1990
Filed: Aug 19, 1985
Inventors
Noel J. Bradshaw
David Hughes
Assignee (at issue)
Unilever Patent Holdings B.V.
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.