Granted Patent
Utility
US 5,035,508 · App. 07/139,181
Light absorption analyser
Inventors:
Timothy J. N. Carter, Roger A. Bunce
Patented Case
View Patent ↗
Granted: Jul 30, 1991
Filed: Dec 29, 1987
Inventors
Timothy J. N. Carter
Roger A. Bunce
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.