) --


(AAPL) - Get Report

shares fell 1.8% to $373.30 in pre-market trading Thursday, following the departure of mobile ad exec Andy Miller. Miller, who joined the company through its acquisition of

Quattro Wireless

, will join venture capital firm Highland Capital Partners.

Eastman Kodak


shares sank 1.9% to $2.64 as the company explores a patent sale, according to

The Wall Street Journal

. Kodak's patents could be attractive to tablet makers, company CEO Antonio Perez told the



The struggling imaging company is looking to cash in around a patent frenzy that has

smartphone makers like Apple, HTC and Samsung aggressively filing lawsuits


Motorola Mobility

(MMI) - Get Report

board member William Hambrecht resigned from his seat on Wednesday

following the company's acquisition



(GOOG) - Get Report

. Hambrecht, who was put on the board by activist investor Carl Icahn, was the co-founder of the investment bank Hambrecht & Quist.


is the focus of a new patent lawsuit by social gaming company

Agincourt Gaming

, which said the


maker has violated two of its patents. The lawsuit

comes as Zynga prepares for an IPO

, which could value the company at $11.5 billion.

Valuations for start-ups rose in the second quarter of 2011, as the number of "up" rounds -- where a company takes money at a higher valuation than the previous round -- exceeded "down" rounds, according to a new study by Silicon Valley law firm Fenwick & West. This marks the eighth consecutive quarter in which up rounds have surpassed down rounds, meaning valuations are continuing to increase to pre-recession levels.

--Written by Olivia Oran in New York.

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