Granted Patent
Utility
US 5,049,013 · App. 07/615,765
Mixer apparatus
Inventors:
David J. Engles, Daniel J. Bentley, Gary A. Quinter, Ronald N. Salzman
Patented Case
View Patent ↗
Granted: Sep 17, 1991
Filed: Nov 19, 1990
Inventors
David J. Engles
Daniel J. Bentley
Gary A. Quinter
Ronald N. Salzman
Assignee (at issue)
Federal Signal 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.