All-spin logic devices
Behtash Behin-Aein, Srikant Srinivasan, Angik Sarkar, Supriyo Datta and Sayeef Salahuddin
U.S. Patent 8,558,571. October 2013

Transistor including paramagnetic impurities and having anti-parallel ferromagnetic contacts
Supriyo Datta and Sayeef Salahuddin
U.S. Patent 7,626,236. December 2009