Granted Patent
Utility
US 4,729,657 · App. 06/877,169
Method of calibrating reflectance measuring devices
Inventors:
David M. Cooper, Ralph S. Hernicz
Patented Case
View Patent ↗
Granted: Mar 8, 1988
Filed: Jun 23, 1986
Inventors
David M. Cooper
Ralph S. Hernicz
Assignee (at issue)
Miles Laboratories, 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.