Granted Patent
Utility
US 5,827,183 · App. 08/959,599
Method of measuring chemical concentration iontophoretically using impermeable mask
Inventors:
Ronald T. Kurnik, Janet Tamada, Michael J. Tierney
Patented Case
View Patent ↗
Granted: Oct 27, 1998
Filed: Oct 29, 1997
Inventors
Ronald T. Kurnik
Janet Tamada
Michael J. Tierney
Assignee (at issue)
Cygnus, 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.