Granted Patent
Utility
US 5,219,346 · App. 07/638,249
Light diffuser for the photodynamic therapy of tumors in the oesophagus of a patient
Inventors:
Georges Wagnieres, Hubert van den Bergh, Philippe Monnier
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Jan 4, 1991
Inventors
Georges Wagnieres
Hubert van den Bergh
Philippe Monnier
Assignee (at issue)
Ciba-Geigy
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.