Joe Bender-Zanoni wrote:
> Andy Newlands patent is on the top tube integral clamp arrangement rather
> than the wishbone seat stays- See U.S. Pat. 4,120,512 at uspto.gov. That
> patent is now expired so feel free to study away and build your own version.
> As to no patent for the stays: the Duquesne and others would be prior art
> and a casting is an obvious variant.
Thanks for the additional info Joe. The 1897 Duquesne actually has a "wishbone theme", with the seatstays, chainstays and fork crown being variations of this style.
Chuck Schmidt L.A.