JCE (John Collins Enterprises)
John Collins Enterprises
Palo Alto, California, USA

JCE (John Collins Enterprises) located in Palo Alto, CA developed and manufactured only few portable electronic calculators around 1972.
All known models (JCE Mark II, Percent, Super D) use the famous Texas Instruments Klixon™ keypad and sport huge 8-digit LED displays. JCE went out of the calculator business some time in 1973 to 1974. 

Source : Joerg Woerner, Datamath Calculator Museum