Yanmars Intigrated hydro mechanical transmission

[winston1]

What do you guys know about the transmission Yanmar has in some of their new models. I see on one Ebay listing the seller is advertising the reverser as "powershift". 217 YANMAR YT359 TRACTOR 4X4 W/ LOADER DUAL REMOTES CRUISE CONTROL...LOADED!!! | eBay

Reading on the subject some indicates something a little different than just hydrastatic. Patent US556911 - Integrated hydro-mechanical automobile transmission - Google Patents