Switch Pitch

[Jim Davies]

On Sun, 31 Jan 1999, Gwyn Reedy wrote:

> Jim,
> 
> You obviously know a lot more about this than I do. Would you care to
> elaborate on the Simpson planetary gearset patent and the Ravigneaux design?
> Or where can one learn more?
> 
The USPTO is the best place to go. The patents would be before the cutoff
date [early 1970s] for internet full text, although you might get some
that reference. Try a patent library, the USPTO has a list, or your local
librarian would know.