new documents released by the USPTO, EEStor's use of the EESU trademark began with "budgetary quotes" submitted to these prospective customers going back to 2002/2003 time frame. But are price quotes sufficient activity to constitute actual use of the EESU trademark in commerce? Read this. Or did EEStor actually ship test units once upon a time?
What's intriguing about the quotes is some of the listed battery specs. The charge times listed aren't the 5 minute charge we've grown accustomed to hearing. Instead the various battery sizes include charge times measured in hours....up to 12.