Nicholas A. Antonopoulos has been granted 8 US patents while listed as an inventor at Keyssa Systems. The first was granted in 2007 and the most recent in September 2020. Nicholas A. Antonopoulos ranks #600,572 of 4,157,543 US inventors in our database (top 14.4%). Patent records list Nicholas A. Antonopoulos in San Jose, CA, US.