Granted Patent
Utility
US 4,426,799 · App. 06/390,311
Vane operated display or indicating device
Inventor:
Donald Winrow
Patented Case
View Patent ↗
Granted: Jan 24, 1984
Filed: Jun 21, 1982
Inventor
Donald Winrow
Assignee (at issue)
NEI Canada 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.