Granted Patent
Utility
US 4,432,434 · App. 06/337,584
Sound absorbing arrangement for air handling units
Inventor:
Frank Dean
Patented Case
View Patent ↗
Granted: Feb 21, 1984
Filed: Jan 7, 1982
Inventor
Frank 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.