Granted Patent
Utility
US 5,657,748 · App. 08/383,002
Powder inhaler with frusto-conical metering surface having dose indentations
Inventor:
Philip Braithwaite
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Feb 3, 1995
Inventor
Philip Braithwaite
Assignee (at issue)
Innovata Biomed Limited
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.