Granted Patent
Utility
US 4,675,286 · App. 06/695,971
Fetal cell separation and testing
Inventor:
Emanuel Calenoff
Patented Case
View Patent ↗
Granted: Jun 23, 1987
Filed: Jan 28, 1985
Inventor
Emanuel Calenoff
Assignee (at issue)
Aspen Diagnostics 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.