Granted Patent
Utility
US 5,018,372 · App. 07/587,827
Filter for automatic washing machine
Inventor:
Ronald L. Altnau
Patented Case
View Patent ↗
Granted: May 28, 1991
Filed: Sep 24, 1990
Inventor
Ronald L. Altnau
Assignee (at issue)
Speed Queen 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.