Kunjan Joshi (former bassist of Vhumi & E.quals and current bassist of SOUL ANNIHILATION) has been endorsed by Blakhart Guitars. Blakhart Guitars is company focused on providing guitars and basses located in South Dakota of U.S. They specially provide high scale guitars, mostly bass for extreme metal players. Some of the famous artists endorsed by Blakhard includes Mike Flores (Origin), Jack Owen (ex-Cannibal Corpse, Deicide) etc.
You can take a complete look on list of featured astist here.