Add up the these: SC 13G/A TURBOSONIC TECHNOLOGIES INC(PERRITT CAPITAL MANAGEMENT INC) 02/14/12 SC 13G/A TURBOSONIC TECHNOLOGIES INC(SPROTT INC.)02/01/12 SC 13G/A TURBOSONIC TECHNOLOGIES INC(BARD ASSOCIATES INC)01/31/12 SC 13G TURBOSONIC TECHNOLOGIES INC(BARD ASSOCIATES INC)01/25/12 http://yahoo.brand.edgar-online.com/default.aspx?cik=900393