Granted Patent
Utility
US 5,092,313 · App. 07/681,868
Gas log fireplace with high heat output
Inventors:
Richard Simon Blackburn, William Anthony Byrne, Stephen F. Richardson, Robert W. Ferguson
Patented Case
View Patent ↗
Granted: Mar 3, 1992
Filed: Apr 5, 1991
Inventors
Richard Simon Blackburn
William Anthony Byrne
Stephen F. Richardson
Robert W. Ferguson
Assignee (at issue)
Vermont Castings, Inc.
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.