8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): March 31, 2008

Tessera Technologies, Inc.

(Exact name of Registrant as Specified in its Charter)

Delaware	000-50460	16-1620029
(State or other jurisdiction of incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

3099 Orchard Drive

San Jose, California 95134

(Address of Principal Executive Offices)

(408) 894-0700

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 7.01. Regulation FD Disclosure.

On March 31, 2008, Tessera Technologies, Inc. issued a press release announcing that the U.S. Patent and Trademark Office (PTO) has issued an initial office action in the ex parte reexamination of Tessera’s U.S. Patent Number 5,679,977 rejecting certain claims of the patent.

The foregoing description is qualified in its entirety by reference to the registrant’s Press Release dated March 31, 2008, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.	Description
99.1	Press Release dated March 31, 2008

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: March 31, 2008	TESSERA TECHNOLOGIES, INC.
	By:	/s/ Charles A. Webster
	Name:	Charles A. Webster
	Title:	Executive Vice President and Chief Financial Officer

EXHIBIT INDEX

Exhibit No.	Description
99.1	Press Release dated March 31, 2008

EX-99.1

EXHIBIT 99.1

Company Contact:

Charlie Webster

Chief Financial Officer

408-894-0700

Moriah Shilton

Investor Relations

408-952-4356

PTO Issues Initial Office Action on Tessera Patent

Tessera Patent Valid Throughout Lengthy Reexamination Process

SAN JOSE, Calif. – March 31, 2008 - Tessera Technologies, Inc. (Nasdaq: TSRA), a leading provider of miniaturization technologies for the electronics industry, today announced that the U.S. Patent and Trademark Office (PTO) has issued an initial office action in the ex parte reexamination of Tessera’s U.S. Patent Number 5,679,977 (‘977 patent) rejecting certain claims of the patent. This initial action is preliminary and non-final, and Tessera will be filing a response to the action. The ‘977 patent is presumed to be valid, intact and enforceable during the reexamination process.

About Tessera Technologies, Inc.

Tessera is a leading provider of miniaturization technologies for the electronics industry. Tessera provides a broad range of advanced packaging, interconnect, and consumer optics solutions which are widely adopted in high-growth markets including consumer, computing, communications, medical and defense electronics. Tessera’s customers include the world’s top semiconductor companies such as Intel, Samsung, Texas Instruments, Toshiba, Micron and Infineon. The company’s stock is traded on the NASDAQ Stock Market under the symbol TSRA. Tessera is headquartered in San Jose, California. www.tessera.com.

Safe Harbor Statement

This press release contains forward-looking statements, which are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements involve risks and uncertainties that could cause actual results to differ significantly from those

projected. Material factors that may cause results to differ from the statements made include delays, setbacks or losses relating to our intellectual property or intellectual property litigations, or any invalidation or limitation of our key patents; fluctuations in our operating results due to the timing of new license agreements and royalties, or due to legal costs; changes in patent laws, regulation or enforcement, or other factors that might affect our ability to protect our intellectual property; the risk of a decline in demand for semiconductor products; failure by the industry to adopt our technologies; competing technologies; the future expiration of our patents; the future expiration of our license agreements and the cessation of related royalty income; the failure or refusal of licensees to pay royalties; failure to achieve the growth prospects and synergies expected from acquisition transactions; and delays and challenges associated with integrating acquired companies with our existing businesses. You are cautioned not to place undue reliance on the forward-looking statements, which speak only as of the date of this release. Tessera’s filings with the Securities and Exchange Commission, including its Annual Report on Form 10-K for the year ended December 31, 2007, include more information about factors that could affect the company’s financial results.

# # #

Tessera and the Tessera logo are registered trademarks of Tessera. All other company, brand and product names may be trademarks or registered trademarks of their respective companies.