Granted Patent
Utility
US 5,468,641 · App. 08/238,003
Device for validating urobilinogen test devices
Inventors:
Robert P. Hatch, Marilyn Radtke
Patented Case
View Patent ↗
Granted: Nov 21, 1995
Filed: May 3, 1994
Inventors
Robert P. Hatch
Marilyn Radtke
Assignee (at issue)
Bayer Aktiengesellschaft
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.