Granted Patent
Utility
US 5,127,874 · App. 07/725,337
Chimney damper with hammer device
Inventor:
Jeffrey B. Wiles
Patented Case
View Patent ↗
Granted: Jul 7, 1992
Filed: Jul 3, 1991
Inventor
Jeffrey B. Wiles
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.