Granted Patent
Utility
US 5,657,590 · App. 08/590,776
Muntin bar assembly
Inventors:
Rodney J. Digman, Clemith E. Sorey, Robert E. Daniels, Jr.
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Jan 24, 1996
Inventors
Rodney J. Digman
Clemith E. Sorey
Robert E. Daniels, Jr.
Assignee (at issue)
QUANEX 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.