Granted Patent
Utility
US 5,160,979 · App. 07/652,487
Test piece coloration comparative decision unit
Inventors:
Hiroyuki Ota, Takao Terada, Bernd G. Herpichboehm, George H. Sierra, Robert B. Summers, Thomas M. Watlington
Patented Case
View Patent ↗
Granted: Nov 3, 1992
Filed: Feb 8, 1991
Inventors
Hiroyuki Ota
Takao Terada
Bernd G. Herpichboehm
George H. Sierra
Robert B. Summers
Thomas M. Watlington
Assignees (at issue)
Omrom Corporation
Boehringer Mannheim GmbH
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.