“Late last week the US Patent & Trademark Office published a patent application from Apple that revealed yet another take on a possible future virtual keyboard for the iMac and other devices,” Jack Purcher reports for Patently Apple.

“Apple’s first major patent concerning larger virtual keyboards surfaced in 2009,” Purcher report. “Then in 2011, a wave of major virtual keyboard patents surfaced that illustrated the depth of Apple’s research in this area.”

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Purcher reports, “Last week Apple revealed their fifth major effort into keyless keyboards by disclosing their new piezo-based acoustic and capacitive detection system which includes a very cool glass based keyboard concept that may be a winner.”

Much more in the full article, including Apple’s patent application illustrations, here.