Tethers Unlimited develops transformative technologies to enable new capabilities and dramatic cost savings for missions in S ... pace, Sea, and Air. Since its founding in 1994, Tethers Unlimited has worked to develop revolutionary technologies to provide cost-effective solutions for hard challenges in space and defense missions, including remediation of space debris, propellant less propulsion for Earth-to-orbit launch and in-space transfer, and on-orbit manufacturing and assembly of large space systems. read more