Granted Patent
Utility
US 4,663,967 · App. 06/744,687
Air flow system bypassing a balance in a model airplane being tested in a wind tunnel
Inventor:
C. Harry Parkinson
Patented Case
View Patent ↗
Granted: May 12, 1987
Filed: Jun 14, 1985
Inventor
C. Harry Parkinson
Assignee (at issue)
DEI-East Inc.
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.