Granted Patent
Utility
US 4,436,081 · App. 06/343,321
Damper assembly for barbecue grill
Inventor:
Dennis V. Hefling
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Jan 27, 1982
Inventor
Dennis V. Hefling
Assignee (at issue)
The Coleman Company, 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.