Granted Patent
Utility
US 5,203,689 · App. 07/792,679
Premix boiler construction
Inventors:
Robert B. Duggan, James V. Goins, Donald E. Holloway, Ronald Moulder
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Nov 15, 1991
Inventors
Robert B. Duggan
James V. Goins
Donald E. Holloway
Ronald Moulder
Assignee (at issue)
The Marley Company LLC
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.