<PAGE>
Exhibit 4(c)


THIS WARRANT AND THE SHARES OF COMMON STOCK OF INTEGRA, INC. WHICH MAY BE
PURCHASED THROUGH THE EXERCISE OF THIS WARRANT HAVE NOT BEEN REGISTERED UNDER
THE SECURITIES ACT OF 1933 OR UNDER ANY STATE SECURITIES LAWS AND MAY NOT BE
PLEDGED, SOLD, ASSIGNED OR TRANSFERRED UNLESS: (I) A REGISTRATION STATEMENT WITH
RESPECT THERETO IS EFFECTIVE UNDER THE SECURITIES ACT OF 1933 AND ANY APPLICABLE
STATE SECURITIES LAW, OR (II) THE COMPANY RECEIVES AN OPINION OF COUNSEL TO THE
COMPANY OR OTHER COUNSEL TO THE HOLDER OF SUCH WARRANT OR COMMON STOCK, WHICH
OTHER COUNSEL IS SATISFACTORY TO THE COMPANY, THAT SUCH SHARES OR WARRANT MAY BE
PLEDGED, SOLD, ASSIGNED OR TRANSFERRED WITHOUT ANY EFFECTIVE REGISTRATION
STATEMENT UNDER THE SECURITIES ACT OF 1933 OR APPLICABLE STATE SECURITIES LAWS.



                                                               SHARES APPLICABLE

Date: July 2, 2001                                                        50,000


                        WARRANT TO PURCHASE COMMON STOCK
                                       OF
                                  INTEGRA, INC.


This Warrant certifies that, for value received, Charles Henri-Weil, an
individual (the "Holder"), is entitled, at any time prior to the Termination
Date (as hereinafter defined), to purchase, subject to the provisions of this
Warrant, 50,000 shares of Common Stock, par value $.01 per shares (the "Common
Stock"), of Integra, Inc., a Delaware corporation (the "Company").

         1.       Exercise of Warrant.

                  At any time during the 120-month period (the "Exercise
Period") after the date hereof (or at the close of business on the next
succeeding business day if such day is not a business day in the Commonwealth of
Pennsylvania), the Holder of this Warrant shall have the right, at the option of
the Holder, without prior notice, to purchase the number of fully paid and
non-assessable shares of the Common Stock, at the Exercise Price, hereinafter
defined. The expiration of the Exercise Period is referred to herein as the
"Termination Date."
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         2.       Method of Exercise.

                  In order to exercise this Warrant, during the Exercise Period
the Holder shall surrender this Warrant during regular business hours at the
Company at its principal office at 1060 First Avenue, King of Prussia,
Pennsylvania 19406, together with (a) the Exercise Price for the aggregate
number of shares purchasable pursuant to the provisions hereof by certified or
bank cashier's check payable to the order of the Company and (b) the attached
Purchase Form duly executed by the Holder. The Company shall thereupon as
promptly as practicable cause the issuance to the Holder of a certificate or
certificates representing the number of shares of Common Stock purchased by the
Holder. At its sole option, and upon request by the Holder in writing during the
Exercise Period, the Company may permit the purchase of less than the entire
number of shares purchasable hereunder, in which case the Company shall as
promptly as practicable cause the issuance to the Holder of a certificate or
certificates representing the number of shares of the Common Stock purchased by
the Holder, and in the event that the Termination Date has not then occurred, a
replacement warrant entitling the Holder, to purchase the balance of the shares
of the Common Stock purchasable hereunder. Such shares of Common Stock, when
issued upon the exercise of this Warrant, shall be validly issued, fully paid
and non-assessable.

         3.       Exercise Price.

                  The exercise price (the "Exercise Price") for each share of
Common Stock upon exercise of this Warrant shall be equal to $.70 per share.

         4.       Adjustment in Number of Shares Purchasable. The following
provisions shall apply from the date hereof until the date of exercise of this
Warrant or the Termination Date, whichever occurs first:

                  (a)      Stock Dividend, Split or Subdivision of Shares. If
the number of shares of Common Stock outstanding at any time after the date
hereof is increased by a stock dividend payable to all holders of Common Stock
or by a subdivision or split-up of shares of Common Stock, then, following the
record date fixed for the determination of holders of Common Stock entitled to
receive such stock dividend, subdivision or split-up, the Exercise Price shall
be appropriately decreased and the number of shares of Common Stock issuable on
exercise of each Warrant shall be increased in proportion to such increase in
outstanding shares.

                  (b)      Combination of Shares. If, at any time after the date
hereof, the number of shares of Common Stock outstanding is decreased by a
combination or consolidation of the outstanding shares of Common Stock, by
reclassification, reverse stock split or otherwise, then, following the record
date for such combination, the Exercise Price shall be appropriately increased
and the number of shares of Common Stock issuable on exercise of each Warrant
shall be decreased in proportion to such decrease in outstanding shares.
<PAGE>
                  (c)      Calculations. All calculations under this Section 4
shall be made to the nearest one-tenth of a cent, or to the nearest one-tenth of
a share, as the case may be.

                  (d)      Merger and Consolidation. If at any time there is a
merger, reorganization or consolidation of the Company into or with another
entity or other similar transaction or series of related transactions in which
more than 50% of the voting power of the Company is disposed of in exchange for
property, rights or securities distributed to holders thereof by the acquiring
person, firm or other entity, or the sale of all or substantially all of the
assets of the Company, then as part of such merger, reorganization,
consolidation or sale, lawful provision shall be made so that the Holder shall
thereafter be entitled to receive upon exercise of its rights to purchase Common
Stock, the number of shares of common stock, cash, property or shares of the
successor corporation resulting from such merger or consolidation, to which a
holder of Common Stock, deliverable upon exercise of the rights to purchase
Common Stock hereunder, would have been entitled in such merger, reorganization,
consolidation or sale if the right to purchase such Common Stock hereunder had
been exercised immediately prior to such merger, reorganization, consolidation
or sale. In any such event, appropriate adjustment shall be made in the
application of the provisions of this Warrant with respect to the rights and
interests of the Holder after such merger, reorganization, consolidation or sale
so that the provisions of this Warrant (including Exercise Price and the number
of shares of Common Stock purchasable pursuant to the terms and conditions of
this Warrant) shall be applicable after that event as near as reasonably may be,
in relation to any shares deliverable upon the exercise of the Holder's rights
to purchase Common Stock pursuant to this Warrant.

                  (e)      Certificate as to Adjustments. Upon the occurrence of
each adjustment or readjustment pursuant to this Section 4, the Company, at its
own expense, shall promptly compute such adjustment or readjustment in
accordance with the terms hereof and furnish to the Holder a certificate setting
forth such adjustment or readjustment and showing in detail the facts upon which
such adjustment or readjustment is based. The Company shall, upon the written
request, at any time, of the Holder, furnish or cause to be furnished to the
Holder a like certificate setting forth: (i) such adjustments and readjustments;
(ii) the Exercise Price at the time in effect; and (iii) the number of shares
and the amount, if any of other property that at the time would be received upon
the exercise of the Warrant.

                  (f)      The Company shall not be required to issue any
fraction of a share of Common Stock upon the exercise of this Warrant. If any
fractional interest in a share of Common Stock shall be deliverable upon the
exercise of this Warrant, the Company shall make an adjustment therefor in cash
equal to such fraction as may be determined in the sole discretion of the
Company.
<PAGE>
         5.       Restrictions on Transferability of Securities.

                  (a)      This Warrant is not transferable by the Holder
otherwise than by will or pursuant to the laws of descent and distribution in
the event of the Holder's death, in which event this Warrant may be exercised by
the heirs or legal representatives of the Holder. This Warrant may be exercised
during the lifetime of the Holder only by the Holder or such Holder's legal
representative in the event of such Holder's incompetence. Any attempt at
assignment, transfer, pledge or disposition of this Warrant contrary to the
provisions hereof or the levy of any execution, attachment or similar process
upon this Warrant shall be null and void and without effect. Any exercise of
this Warrant by a person other than the Holder shall be accompanied by
appropriate proofs of the right of such person to exercise this Warrant.

                  (b)      Neither this Warrant nor the Common Stock issuable
upon exercise hereof (collectively the "Securities") has been registered under
the Securities Act of 1933, as amended (the "Act") or any applicable state
securities laws, by reason of exemptions from the registration requirements of
the Act and such laws.

                  (c)      This Warrant has been taken by the Holder for
investment and without a view to resale or distribution thereof and may not be
sold, pledged, assigned or otherwise disposed of in the absence of an effective
registration statement for the Securities under the Act or unless an exemption
from such registration is available.

                  (d)      Each certificate representing (i) Common Stock and
(ii) any other securities issued in respect of the Common Stock upon any Common
Stock split, Common Stock dividend, recapitalization, merger, consolidation or
similar event shall (unless otherwise permitted or unless the securities
evidenced by such certificate shall have been registered under the Act) be
stamped or otherwise imprinted with a legend in the following form (in addition
to any legend required under applicable state securities laws):

         THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933
         (THE "1933 ACT") OR UNDER ANY APPLICABLE STATE SECURITIES LAWS. THE
         SECURITIES HAVE BEEN TAKEN BY THE REGISTERED OWNER FOR INVESTMENT, AND
         WITHOUT A VIEW TO RESALE OR DISTRIBUTION THEREOF, AND MAY NOT BE
         TRANSFERRED OR DISPOSED OF WITHOUT AN OPINION OF COUNSEL SATISFACTORY
         TO THE ISSUER THAT SUCH TRANSFER OR DISPOSITION DOES NOT VIOLATE THE
         1933 ACT AND THE RULES AND REGULATIONS THEREUNDER.

         6.       Reservation of Shares.

                  The Company covenants and agrees that, during the Exercise
Period, the Company will at all times have authorized and reserved, out of its
authorized but
<PAGE>
unissued shares of its Common Stock, a sufficient number of shares to provide
for the exercise in full of the rights represented by this Warrant. In
accordance with and subject to applicable laws and regulations, the Company
shall from time to time increase its number of authorized shares of Common Stock
so as to maintain a number of such shares sufficient to permit the exercise of
this Warrant.

         7.       Lost Documents.

                  Upon receipt by the Company of evidence satisfactory to it of
the loss, theft, destruction or mutilation of this Warrant or any warrants
exchanged for it, and (in case of loss, theft or destruction) of indemnity or
security satisfactory to it, and upon reimbursement to the Company of all
reasonable expenses incidental thereto, and upon surrender and cancellation of
such warrant, if mutilated, the Company shall make and deliver in lieu of such
warrant a replacement warrant.

         8.       Rights of Holder. The Holder shall not, by virtue of this
Warrant, be entitled to any rights of a shareholder of the Company, either at
law or equity, and the rights of the Holder are limited to those expressed
herein.

         9.       Miscellaneous.

                  (a)      Parties in Interest. All covenants, agreements and
undertakings in this Warrant by and on behalf of any of the parties hereto shall
bind and inure to the benefit of the respective successors and assigns of the
parties hereto whether so expressed or not.

                  (b)      Notices. All notices, requests, consents and demands
shall be made in writing and shall be mailed first class, postage prepaid, to
the Company or to the Holder of this Warrant at such respective addresses as may
be furnished in writing to the other party hereto.

                  (c)      Amendments. The terms and provisions of this Warrant
may not be modified or amended, or any provisions hereof waived, temporarily or
permanently, except by written consent of the Company and the Holder hereof.

                  (d)      Governing Law. This Warrant shall be construed and
enforced in accordance with, and the rights of the parties shall be governed by,
the laws of the Commonwealth of Pennsylvania and of the United States.
<PAGE>
           IN WITNESS WHEREOF, this Warrant has been executed and delivered as a
sealed instrument on the date first written above.

                                              INTEGRA, INC.

[Corporate Seal]

                                              By:  ___________________________
                                                        Shawkat Raslan
                                                        Office of the Chairman


Attest:  _________________________
           Jack N. Brown
           Secretary
<PAGE>
                                  PURCHASE FORM




Integra, Inc.
1060 First Avenue
King of Prussia, PA  19406


                  The undersigned hereby (a) irrevocably elects to exercise the
attached Warrant to the extent of _________________ shares of Common Stock, par
value $.01 per share, of Integra, Inc. and hereby tenders $___________ in
payment of the purchase price therefor.

                   INSTRUCTIONS FOR REGISTRATION OF SECURITIES

           Name: _______________________________________________________
                              [Please typewrite or print]

           Address: _____________________________________________________

           Social Security
           or Taxpayer Ident. No. ________________________________________




                                                By:_____________________________