Granted Patent
Utility
US 5,498,757 · App. 08/417,072
Milk frothing and heating system
Inventors:
Michael W. Johnson, Christopher J. Engler
Patented Case
View Patent ↗
Granted: Mar 12, 1996
Filed: Apr 4, 1995
Inventors
Michael W. Johnson
Christopher J. Engler
Assignee (at issue)
Boyd Coffee Company
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.