Granted Patent
Utility
US 4,389,217 · App. 06/209,931
Integrated time-temperature or radiation-dosage history recording device
Inventors:
Ray H. Baughman, Gordhanbhai N. Patel, Granville G. Miller
Patented Case
View Patent ↗
Granted: Jun 21, 1983
Filed: Nov 24, 1980
Inventors
Ray H. Baughman
Gordhanbhai N. Patel
Granville G. Miller
Assignee (at issue)
ALLIED CONSULTING, 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.