Granted Patent
Utility
US 4,688,572 · App. 06/819,999
Medical/sports thermal pack
Inventors:
Vance M. Hubbard, Welton K. Brunson, Darrell S. Caldwell
Patented Case
View Patent ↗
Granted: Aug 25, 1987
Filed: Jan 21, 1986
Inventors
Vance M. Hubbard
Welton K. Brunson
Darrell S. Caldwell
Assignee (at issue)
Tecnol, 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.