: Use the Safari browser to visit the official ESignPatch site or a community repo like Zeejb.
If a tool requires you to download a desktop app (outside of a mobile store), ask why. Modern eSign should work 100% in Chrome, Edge, or Safari.
If you meant a specific software update patch , let me know the version number!
Totally free electronic signatures and online notary services.
If your intent is academic, there is significant research on "." A relevant paper describes the design of a 24GHz rectangular microstrip patch antenna for wireless applications.