Granted Patent
Utility
US 4,876,951 · App. 07/130,622
Air register handle arrangement
Inventor:
Donald J. Vork
Patented Case
View Patent ↗
Granted: Oct 31, 1989
Filed: Dec 9, 1987
Inventor
Donald J. Vork
Assignee (at issue)
HART & COOLEY, 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.