Granted Patent
Utility
US 4,307,994 · App. 06/084,787
Variable vane position adjuster
Inventor:
Donald Brewer
Patented Case
View Patent ↗
Granted: Dec 29, 1981
Filed: Oct 15, 1979
Inventor
Donald Brewer
Assignee (at issue)
General Motors LLC
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.