EXHIBIT 10.58

INTERDIGITAL COMMUNICATIONS CORPORATION

RESTRICTED STOCK UNIT AWARD AGREEMENT

This Restricted Stock Unit Award Agreement (this “Agreement”) is made as of
January 1, 2007 (the “Date of Grant”) by InterDigital Communications Corporation
(the “Company”) to                      (“Grantee”) pursuant to the terms of the
InterDigital Communications Corporation 1999 Restricted Stock Plan (the “Plan”),
and is intended to constitute Performance RSUs, as that term is used in the Long
Term Compensation Program Terms and Conditions.

Definitions. Capitalized terms shall have the meanings set forth below or in the
Plan. As used herein:

“Account” shall mean a bookkeeping account reflecting Grantee’s interest in
restricted stock units.

“Cause” means: (a) willful and repeated failure of Grantee to perform
substantially his or her duties (other than any such failure resulting from
incapacity due to physical or mental illness); (b) Grantee’s conviction of, or
plea of guilty or nolo contendere to, a felony which is materially and
demonstrably injurious to the Company or an Affiliate; (c) willful misconduct or
gross negligence by Grantee in connection with his or her service to the
Company; or (d) Grantee’s breach of any material obligation or duty owed to the
Company or an affiliate.

“Change in Control Event” means any transaction or series of transactions that
constitutes both a Change of Control as defined in the Plan and a “change in the
ownership” of the Company, a “change in effective control” of the Company, or a
“change in the ownership of a substantial portion of the assets” of the Company
for purposes of Code Section 409A and applicable IRS guidance promulgated
thereunder.

“Disability” a disability entitling Grantee to long-term disability benefits
under the applicable long-term disability plan of the Company (or its Affiliate
if Grantee is employed by such Affiliate); or (b) if Grantee is not covered by
such a plan, a physical or mental condition or illness that renders Grantee
incapable of performing his or her duties for a total of 180 days or more during
any consecutive 12-month period.

“Dividend Equivalent” means credits arising in respect of dividends paid on
Shares, as described in Section 6 herein.

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“Fair Market Value” means the closing price of a Share on the exchange or on
NASDAQ, as reported in The Wall Street Journal on the relevant valuation date
or, if there is no trading on that date, on the next preceding trading date.

“Restricted Period” means the period beginning on the Date of Grant and ending
on the Vesting Date.

“Restricted Stock Unit” means a right to receive                      Shares
issued pursuant to the Plan.

“Retirement” means resignation by Grantee after attaining a combination of age
plus years of service at the Company (and Affiliates) equal to 70 with the
consent of the Company.

“Vesting Date” means January 1, 2010, subject to the conditions set forth in
Section 4 below.

Grant of Restricted Stock Units.

Subject to the terms and conditions set forth herein and in the Plan, the
Company hereby grants to Grantee the Restricted Stock Units. The Company shall
maintain an Account for Grantee reflecting the number of Restricted Stock Units
credited to Grantee hereunder.

All of the terms, conditions and other provisions of the Plan are hereby
incorporated by reference into this Agreement. Capitalized terms used in this
Agreement but not defined herein shall have the same meanings as in the Plan. If
there is any conflict between the provisions of this Agreement and the
provisions of the Plan, the provisions of the Plan shall govern. Grantee
acknowledges receipt of the Plan, a copy of which is annexed hereto, represents
that he/she is familiar with the terms and provisions thereof and hereby agrees
to be bound by the Plan (as presently in effect or hereafter amended) and this
Agreement, and by all decisions and determinations of the Committee thereunder.
(For purposes of this provision and other provisions of this Agreement,
references to the Committee include any persons or administrative body to whom
the Committee has delegated authority.)

Restrictions on Restricted Stock Units. Subject to the terms and conditions set
forth herein and in the Plan, Grantee shall not be permitted to sell, transfer,
pledge or assign the Restricted Stock Units except by will or by the laws of
descent and distribution. No such transfer occurring as a result of the
Grantee’s death shall be effective to bind the Company unless the Committee
shall have been furnished with a copy of the applicable will or such other
evidence as the Committee may deem necessary to establish the validity of the
transfer.

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Vesting and Forfeiture.

Restricted Stock Units granted hereunder shall vest (meaning that the risk of
forfeiture of such Restricted Stock Units shall lapse) on the Vesting Date if
all of the following conditions are met:

Grantee remains continuously employed by the Company through that date; and

One or more of the Performance Target or Targets set forth in the Performance
Target Schedule attached hereto as Exhibit A have been attained. Each Restricted
Stock Unit credited under Section 6 in respect of Dividend Equivalents shall
vest at the time of vesting of the Restricted Stock Unit that gives rise,
directly or indirectly, to such Dividend Equivalent.

For purposes of this Section 4(b), the portion of the Restricted Stock Units
granted hereunder that becomes vested on the Vesting Date shall be determined by
reference to the Performance Target Schedule, and any Restricted Stock Units
that do not become vested as of the Vesting Date shall be immediately forfeited
without regard to the Grantee’s continued employment with the Company.

If Grantee’s service as a director and/or employee of the Company ends prior to
the Vesting Date due to a termination for Cause or a resignation for any reason
other than Grantee’s death, Disability, Retirement, or termination by the
Company without Cause, all Restricted Stock Units granted hereunder will be
forfeited.

If Grantee’s service or employment with the Company ceases prior to the Vesting
Date due to death, Disability, Retirement, or termination by the Company without
Cause, Grantee will become vested in a pro-rata portion of his or her Restricted
Stock Units. That pro-rata portion will be determined by multiplying the number
of Restricted Stock Units by a fraction equal to the portion of the Restricted
Period that has transpired prior to such cessation of service or employment.
Settlement for Restricted Stock Units that become vested pursuant to this
Section 4(c) will occur subject to the terms of the Plan as set forth in
Section 5(a) of this Agreement; provided, however, that in no event will
settlement of Grantee’s Restricted Stock Units be made before the date which is
six months after the date of Grantee’s termination of employment if Grantee is a
“specified employee” within the meaning of Section 409A(a)(2)(B)(i) of the
Internal Revenue Code, or any successor provision.

Settlement and Election to Defer Settlement.

Restricted Stock Units credited hereunder (including Restricted Stock Units
credited in respect of Dividend Equivalents) will be settled by delivery of one
share of the Company’s Common Stock for each Restricted Stock Unit being
settled. Subject to Section 4(c) of this Agreement, settlement will occur as
soon as practicable following both scoring by the Compensation Committee of the
goals set forth on Exhibit A and passage of the applicable Vesting Date, but in
no event later than March 15, 2010.

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Dividend Equivalents and Adjustments. Dividend Equivalents shall be credited on
Restricted Stock Units (other than Restricted Stock Units that, at the relevant
record date, previously have been settled or forfeited) in accordance with this
Section 6:

Cash Dividends. If the Company declares and pays a dividend or distribution on
its Shares in the form of cash, then a number of additional Restricted Stock
Units shall be credited to Grantee’s Account as of the payment date for such
dividend or distribution equal to the number of Restricted Stock Units credited
to the Account as of the record date for such dividend or distribution,
multiplied by the amount of cash actually paid as a dividend or distribution on
each outstanding Share at such payment date, divided by the Fair Market Value of
a Share as of such payment date.

Non Cash Dividends. If the Company declares and pays a dividend or distribution
on Shares in the form of property other than Shares, then a number of additional
Restricted Stock Units shall be credited to Grantee’s Account as of the payment
date for such dividend or distribution equal to the number of Restricted Stock
Units credited to the Account as of the record date for such dividend or
distribution, multiplied by the fair market value of such property actually paid
as a dividend or distribution on each outstanding Share at such payment date,
divided by the Fair Market Value of a Share as of such payment date.

Stock Dividends. If the Company declares and pays a dividend or distribution on
Shares in the form of additional Shares, then a number of additional Restricted
Stock Units shall be credited to Grantee’s Account as of the payment date for
such dividend or distribution equal to the number of Restricted Stock Units
credited to the Account as of the record date for such dividend or distribution
or split, multiplied by the number of additional Shares actually paid as a
dividend or distribution or issued in such split in respect of each outstanding
Share.

Other Terms Relating to Restricted Stock Units.

The number of Restricted Stock Units credited to a Grantee’s Account shall
include fractional Restricted Stock Units calculated to at least three decimal
places, unless otherwise determined by the Committee. Upon settlement of
Restricted Stock Units, Grantee shall be paid, in cash, an amount equal to the
value of any fractional Share that would have otherwise been deliverable in
settlement of such Restricted Stock Units.

It shall be a condition to the Company’s obligation to issue and deliver Shares
in settlement of the Restricted Stock Units that Grantee (or the person to whom
ownership rights may have passed by will or the laws of descent and
distribution) pay to the Company, upon its demand, such amount as may be
required by the Company for the purpose of satisfying any liability to withhold
federal, state, or local income or other taxes. If the amount required is not
paid, the

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Company may refuse to deliver the Shares in settlement of the Restricted Stock
Units until such amount is paid. The Committee may, in its discretion, permit a
Grantee (or the person to whom ownership rights may have passed by will or the
laws of descent and distribution) to pay all or a portion of the amount required
by the Company for such tax withholding, at such time and in such manner as the
Committee shall deem to be appropriate, including by authorizing the Company to
withhold from the Shares to be delivered in settlement, or by agreeing to
surrender to the Company on or about the date such tax liability is
determinable, Shares having a Fair Market Value on such date equal to the amount
of such tax liability or a specified portion of such tax liability.

Absence of Tax Gross-Up Payment. There shall be no tax gross-up on the
Restricted Stock Units.

Notices. Any notice to the Company under this Agreement shall be made in care of
the Committee to the office of the General Counsel, at the Company’s main office
in King of Prussia, Pennsylvania. All notices under this Agreement shall be
deemed to have been given when hand-delivered or mailed, first class postage
prepaid, and shall be irrevocable once given.

Securities Laws. The Committee may from time to time impose any conditions on
the Restricted Stock Units (or the underlying Shares) as it deems necessary or
advisable to comply with applicable securities laws.

Award Not to Affect Service. The award granted hereunder shall not confer upon
Grantee any right to continue service as an employee and/or director of the
Company.

Miscellaneous.

The address for Grantee to which notice, demands and other communications to be
given or delivered under or by reason of the provisions hereof shall be the
Grantee’s address as reflected in the Company’s personnel records.

Grantee authorizes the Company to withhold in accordance with applicable law
from any compensation payable to him/her any taxes required to be withheld by
federal, state or local law in connection with this award.

Any provision for distribution in settlement of Grantee’s Account hereunder
shall be by means of bookkeeping entries on the books of the Company and shall
not create in Grantee or any person to whom ownership right may have passed any
right to, or claim against any specific assets of the

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Company, nor result in the creation of any trust or escrow account for Grantee
or any person to whom ownership rights may have passed. Grantee (or any other
person entitled to a distribution hereunder) shall be a general creditor of the
Company.

To the extent not preempted by federal law, the validity, performance,
construction and effect of this award shall be governed by the laws of the
Commonwealth of Pennsylvania, without giving effect to principles of conflicts
of law.

To the extent Grantee elects to defer settlement of Restricted Stock Units
pursuant to Section 5(b), this Agreement is intended to constitute part of a
“top-hat” plan described in Section 201(2) of ERISA.

Claims Procedure.

To initiate a claim with respect to the settlement of Restricted Stock Units
deferred in accordance with Section 5(b), Grantee (or the person to whom
ownership rights may have passed by will or the laws of descent and
distribution) (the “Claimant”) must file a written request with the Company.
Upon receipt of such claim, the Company will advise the Claimant within ninety
(90) days of receipt of the claim whether the claim is denied. If special
circumstances require more than ninety (90) days for processing, the Claimant
will be notified in writing within ninety (90) days of filing the claims than
the Company requires up to an additional ninety (90) days to reply. The notice
will explain what special circumstances make an extension necessary and indicate
the date a final decision is expected to be made.

If the claim is denied in whole or in part, the Claimant will be provided a
written opinion, in language calculated to be understood by the Claimant,
setting forth (i) the specific reason(s) for the denial of the claim, or any
part of it, (ii) specific reference(s) to pertinent provisions of the Plan or
this award upon which such denial was based, (iii) a description of any
additional material or information necessary for the Claimant to perfect the
claim, and an explanation of why such material or information is necessary,
(iv) an explanation of the claim appeal procedure set forth in Section 13(c),
below; and (v) a statement of the Claimant’s right to bring a civil action under
section 502(a) of ERISA following an adverse determination upon appeal.

Within sixty (60) days after receiving a notice from the Company that a claim
has been denied, in whole or in part, a Claimant (or the Claimant’s duly
authorized representative) may file with the Company a written request for a
review of the denial of the claim. The Claimant or his duly authorized
representative may, but need not, review the pertinent documents and submit
issues and comments in writing for consideration by the Company. If the Claimant
does not request a review of the initial determination within such sixty
(60) days period, the Claimant will be barred and estopped from challenging the
determination.

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Within sixty (60) days after the Company’s receipt of a request for review, it
will review the initial determination. After considering all materials presented
by the Claimant, without regard to whether such materials were submitted or
considered in the initial review, the Company will render a written opinion. The
manner and content of the final decision will include the same information
described above in Section 13(b) with respect to the initial determination. If
special circumstances require that the sixty (60) day time period be extended,
the Company will so notify the Claimant and will render the decision as soon as
possible, but no later than one hundred twenty (120) days after receipt of the
request for review. The notice will explain what special circumstances make an
extension necessary and indicate the date a final decision is expected to be
made. Any decision on appeal will be final, conclusive and binding upon all
parties.

IN WITNESS WHEREOF, the Company has caused this Restricted Stock Unit Award
Agreement to be executed by its duly authorized officer, and Grantee has
executed this Restricted Stock Unit Award Agreement, in each case as of the date
first above written.

 

INTERDIGITAL COMMUNICATIONS CORPORATION By:      Name:   William J. Merritt,
President & CEO GRANTEE By:      Name:  

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EXHIBIT A

PERFORMANCE TARGET SCHEDULE

By January 1, 2010, InterDigital must achieve certain design wins, and specified
volumes of chip sales containing InterDigital content must be met (the
“Performance Targets”). Each Performance Target is worth 50% of the payout, if
any. The following table indicates the percentage of your performance RSUs that
will vest depending upon the level of the Performance Target that is achieved,
as more fully described in the Performance Share Goals Presentation delivered to
you January 4, 2007.