Granted Patent
Utility
US 4,401,970 · App. 06/272,841
Vital lowest speed command selector
Inventor:
John O. G. Darrow
Patented Case
View Patent ↗
Granted: Aug 30, 1983
Filed: Jun 12, 1981
Inventor
John O. G. Darrow
Assignee (at issue)
American Standard 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.