Granted Patent
Utility
US 4,630,504 · App. 06/768,294
Dual-pass continuously variable transmission
Inventor:
Richard L. Smirl
Patented Case
View Patent ↗
Granted: Dec 23, 1986
Filed: Aug 22, 1985
Inventor
Richard L. Smirl
Assignee (at issue)
BorgWarner 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.