Granted Patent
Utility
US 4,089,618 · App. 05/655,550
Fan with noise reduction
Inventor:
Jay Patel
Patented Case
View Patent ↗
Granted: May 16, 1978
Filed: Feb 5, 1976
Inventor
Jay Patel
Assignee (at issue)
Rotron, 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.