Granted Patent
Utility
US 5,011,600 · App. 07/366,591
Water filtration system for aquariums
Inventors:
Edmund J. Mowka, Jr., Thomas A. Frakes, Larry M. Pettengill
Patented Case
View Patent ↗
Granted: Apr 30, 1991
Filed: Jun 14, 1989
Inventors
Edmund J. Mowka, Jr.
Thomas A. Frakes
Larry M. Pettengill
Assignee (at issue)
Aquarium Systems, 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.