Granted Patent
Utility
US 5,263,475 · App. 07/853,460
Inhaler
Inventors:
Daniel Altermatt, Hanspeter Hilpert, Satish C. Khanna, Werner F. Dubach, Anton Spaltenstein
Patented Case
View Patent ↗
Granted: Nov 23, 1993
Filed: Mar 18, 1992
Inventors
Daniel Altermatt
Hanspeter Hilpert
Satish C. Khanna
Werner F. Dubach
Anton Spaltenstein
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.