Granted Patent
Utility
US 4,992,377 · App. 07/183,671
Article for carrying out biological or chemical procedures containing magnetically responsive material
Inventor:
Rolf Saxholm
Patented Case
View Patent ↗
Granted: Feb 12, 1991
Filed: Apr 19, 1988
Inventor
Rolf Saxholm
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.