Granted Patent
Utility
US 4,843,198 · App. 07/265,037
Burner control device and electrical switch unit assembly, parts therefor and methods of making the same
Inventor:
William J. Lichtenberger
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Oct 31, 1988
Inventor
William J. Lichtenberger
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE LIMITED
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.