Granted Patent
Utility
US 4,950,984 · App. 07/319,965
Apparatus for determining the proportion of a substance having paramagnetic properties in a mixture of substances
Inventors:
Johann Otten, Scato Albarda, Hansjochen Schuck
Patented Case
View Patent ↗
Granted: Aug 21, 1990
Filed: Mar 7, 1989
Inventors
Johann Otten
Scato Albarda
Hansjochen Schuck
Assignee (at issue)
DRAGERWERK AKTIEGESELLSCHAFT
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.