Jeri Ellsworth is named inventor on US20050146882A1, a patent for a virtual reality attachment enhancing head-mounted display systems, filed in 2004.
On November 24, 2004, Jeri Ellsworth was named as an inventor on the U.S. patent application "Virtual reality attachment for a head mounted display" (US20050146882A1).
Head-mounted displays (HMDs) were, at the time of this filing, still a niche and largely experimental technology, used mainly in research labs, military simulators, and specialized industrial applications. Consumer virtual reality as a mass-market category was still more than a decade away — modern consumer VR headsets would not gain mainstream traction until the mid-2010s.
This patent describes hardware designed to attach to and augment existing head-mounted display systems, enhancing their functionality for immersive virtual reality applications. The filing reflects Ellsworth's early hands-on engagement with the hardware challenges of immersive computing: optics, ergonomics, tracking, and display integration.
Her early involvement in VR hardware development, years before the current VR/AR boom, positioned her as a pioneering figure in a field that would only later become widely recognized as commercially and culturally significant. This body of early patent work provided a technical foundation that informed her later, more publicly visible projects, including her research role at Valve Corporation and her subsequent AR startups.