Legacy Technologies LLC is a hermetic glass seal manufacturer specializing in glass-to-metal seals for various industries including aerospace, telecommunications, medical, automotive, and sensor applications. They offer a wide range of hermetic seal capabilities, including precision quartz crystal holders, hermetic connectors, and custom-built GTM seals using an oxide-free hermetic sealing process. Legacy Technologies focuses on providing solutions for getting electrical or optical signals in or out of hermetically sealed packages to protect sensitive electronics from harsh environments. They also offer products like frequency control bases and feedthroughs, with improved in-house vertical integration capabilities for glass seals.