Granted Patent
Utility
US 6,446,426 · App. 09/564,646
Miniature pulsed heat source
Inventors:
William R. Sweeney, A. Clifton Lilly, Jr.
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: May 3, 2000
Inventors
William R. Sweeney
A. Clifton Lilly, Jr.
Assignee (at issue)
Philip Morris 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.