Obocon Inc. (CLSI: Pink Current) | Symbol Change Thu, Nov 19, 2020 12:00 - Obocon Inc. ( CLSI : Pink Current) - Symbol Change - The symbol, CLSI, is no longer a valid symbol for Obocon Inc.. As of Thu, Nov 19, 2020, the new trading symbol is CLSID. You may find a complete list of symbol changes at otcmarkets.com .