Granted Patent
Utility
US 5,040,970 · App. 07/508,799
Burner construction and method of making the same
Inventor:
Fred Riehl
Patented Case
View Patent ↗
Granted: Aug 20, 1991
Filed: Apr 12, 1990
Inventor
Fred Riehl
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.