Granted Patent
Utility
US 5,066,136 · App. 07/608,023
Vibratory mixers
Inventor:
Alan S. Johnson
Patented Case
View Patent ↗
Granted: Nov 19, 1991
Filed: Oct 29, 1990
Inventor
Alan S. Johnson
Assignee (at issue)
Red Devil, 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.