The "Patched" version of Font60 often focuses on optimizing display clarity for high-resolution or custom interfaces. This new feature— Adaptive Vector Anti-Aliasing (AVAA)
setup where this font is used? Providing more context about where you saw the term would help in locating the exact documentation.
If the file doesn't open, use a hex editor like HxD to check if these initial bytes have been overwritten or "patched."
JCheada is not a major foundry like Monotype or Adobe. Instead, it appears to be a derivative or a specific build from a hobbyist or independent developer (likely a username handle "jcheada" on GitHub or GitLab). Historically, this name surfaces in relation to bitmap fonts—specifically, fonts designed for low-resolution screens (CRTs and early X11 terminals).