Granted Patent
Utility
US 4,731,330 · App. 06/880,696
Whole blood control sample
Inventors:
James Hill, Laura J. Winfrey
Patented Case
View Patent ↗
Granted: Mar 15, 1988
Filed: Jul 1, 1986
Inventors
James Hill
Laura J. Winfrey
Assignee (at issue)
Biotrack, LLC
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.