Private Equity Hub -- San Diego Tech Coast Angels, a member of the largest angel network in the United States and the number one source of start-up funding in Southern California, announced today that the group’s seed track has closed a Series A financing for AgileNano, a San Diego-based company developing technologies to minimize military injuries such as traumatic brain injury (TBI) resulting from explosions, and to increase comfort and protection of sporting equipment such as shoes and helmets.