Granted Patent
Utility
US 4,576,141 · App. 06/692,215
Fireplace apparatus for sliding door aperture
Inventor:
Robert Lillard
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: Jan 17, 1985
Inventor
Robert Lillard
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.