Granted Patent
Utility
US 4,844,097 · App. 07/006,653
Apparatus and method for testing liquids
Inventors:
Brian J. Bellhouse, Sydney M. Pugh
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Feb 9, 1987
Inventors
Brian J. Bellhouse
Sydney M. Pugh
Assignee (at issue)
Bellhouse Technology Limited
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.