Granted Patent
Utility
US 5,527,451 · App. 08/207,380
Water treatment device with volume totalization valve
Inventors:
Richard D. Hembree, Brian Francis SULLIVAN
Patented Case
View Patent ↗
Granted: Jun 18, 1996
Filed: Mar 8, 1994
Inventors
Richard D. Hembree
Brian Francis SULLIVAN
Assignee (at issue)
Recovery Engineering, 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.