Granted Patent
Utility
US 5,152,934 · App. 07/682,508
Mixing system for gas dispersion in liquids or liquid suspensions
Inventors:
Kenneth S. Lally, Richard Howk
Patented Case
View Patent ↗
Granted: Oct 6, 1992
Filed: Apr 8, 1991
Inventors
Kenneth S. Lally
Richard Howk
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.