Granted Patent
Utility
US 5,596,271 · App. 08/237,201
Method of and apparatus for detecting the rotation rate of an air moving fan
Inventor:
Vernon Lowery
Patented Case
View Patent ↗
Granted: Jan 21, 1997
Filed: May 3, 1994
Inventor
Vernon Lowery
Assignee (at issue)
Multicraft International
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.