Granted Patent
Utility
US 5,237,281 · App. 07/612,177
Ion drag air flow meter
Inventors:
Jackie R. Webster, David B. Chang, Keith Pearson
Patented Case
View Patent ↗
Granted: Aug 17, 1993
Filed: Nov 13, 1990
Inventors
Jackie R. Webster
David B. Chang
Keith Pearson
Assignee (at issue)
Hughes Aircraft Company
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.