Research In Motion, manufacturer of the BlackBerry smart phone, now has three operations in the Triangle that occupy 78,000 square feet.

The Canada-based company said in a filing with the Securities and Exchange Commission this week that it had expanded its North Carolina investment.

“Operations in Raleigh, North Carolina have increased to a total of 78,000 square feet represented by the addition of two locations in the CentreGreen campus,” the filing said.

As The Triangle Business Journal reported, however, RIM’s offices are actually located in Cary (two) and Durham. The total space is “about double” that occupied by RIM in 2010, according to the story.

The space offers enough room for about 200 workers, the newspaper said.

RIM chose to expand to the Triangle after Sony Ericsson decided to bolt the area for Atlanta.

Taiwan-based HTC and Garmin also committed to the area.

RIM’s expansion here reflects the company’s attempts to expand beyond the BlackBerry smart phone line. Its new PlayBook tablet launches April 19.

Plus, the company struck a deal this week to gain access to 30,000 patents held by Intellectual Ventures.

For more about the PlayBook, read here.

For details of the patent deal, read here.

Read the SEC filing here.

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