Granted Patent
Utility
US 5,135,645 · App. 07/676,416
Refrigerator water filter
Inventors:
John S. Sklenak, Sol Aisenberg, Thomas J. Martel
Patented Case
View Patent ↗
Granted: Aug 4, 1992
Filed: Mar 28, 1991
Inventors
John S. Sklenak
Sol Aisenberg
Thomas J. Martel
Assignee (at issue)
Raytheon Company
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.