Granted Patent
Utility
US 4,385,357 · App. 05/896,568
Water treatment system and control therefor
Inventors:
Stephen H. Davis, Donald J. Muckerheide
Patented Case
View Patent ↗
Granted: May 24, 1983
Filed: Apr 14, 1978
Inventors
Stephen H. Davis
Donald J. Muckerheide
Assignee (at issue)
Water Refining, 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.