Granted Patent
Utility
US 4,246,918 · App. 06/010,541
Method and apparatus for forced air balancing of damper blades
Inventor:
Raymond H. Dean
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Feb 9, 1979
Inventor
Raymond H. Dean
Assignee (at issue)
Tempmaster 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.