Granted Patent
Utility
US 4,828,401 · App. 07/063,160
Temperature monitoring apparatus and method therefor
Inventor:
David Sawyer
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: Jun 17, 1987
Inventor
David Sawyer
Assignee (at issue)
Systron Donner Corporation
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.