Document:

<PAGE>
                                                                   Exhibit 10.22

                                 LEASE ADDENDUM

     This Lease Addendum is entered into this 31st day of July, 1997 by and
between Conceptus, Inc. ("CONCEPTUS") as Tenant, and Three Sisters Ranch
Enterprises ("TSRE") as Landlord (successor to Trammel Crow NW, Inc. and
Industrial Way 1 Limited Partnership).

     Conceptus and TSRE agree that the lease for the certain premises known as
981 Industrial Road, San Carlos, California. That six (6) building project
totaling approximately, 123,280 square feet commonly known as San Carlos
Business Park, San Carlos, California, is modified as follows:

1.   Tenant, by this Addendum, includes 957 G, 957 H and 957 R Industrial Road,
     San Carlos as part of the demised premises: Tenant shall pay rent according
     to the existing rent schedule (starting at $1.05 per square foot per month
     NNN) for 2,800 +/- square feet in Units G, & H commencing September 1, 1997
     and for 1,000 +/- square feet in Unit R commencing November 1, 1997. The
     rent term shall be co-terminus with the existing lease and, in addition to
     the lease term, all other terms and conditions shall remain the same.

2.   Landlord shall deliver 957 G, and 957 H Industrial Road, San Carlos to
     Tenant on or before September 1, 1997 and 957 R Industrial Road, San
     Carlos, to Tenant on or before November 1,1997.

3.   Copies of all legal notices from Tenant shall also be copied to Landlord's
     attorney:

          Ted J. Hannig
          Miller, Starr & Regalia
          1001 Marshall Street, Suite 100
          Redwood City, Ca 94063
          Fax: 415/482-3030

     Except as modified, the Lease between Landlord and Tenant shall remain in
full force and effect.

CONCEPTUS, INC.

By:    /s/ Stanford Fitch
       -----------------------------
       Mr. Stanford Fitch

Title: Vice President, Finance & CFO

Date:  7/31/1997
       -----------------------------

THREE SISTERS RANCH ENTERPRISES
A California Partnership

By:    /s/ Martin Ruberry
       -----------------------------
       Mr. Martin E. Ruberry

Title: General Manager

Date:  7/31/1997
       -----------------------------<PAGE>
                                                                   Exhibit 10.23

                              THREE SISTERS RANCH

                                   ENTERPRISES

                 LEASE ADDENDUM & PARTIAL TERMINATION AGREEMENT

TENANT                           Conceptus, Inc.

TENANT'S ADDRESS:                981 Industrial Road
                                 San Carlos, CA 94070

LANDLORD:                        Three Sisters Ranch Enterprises

LANDLORD'S ADDRESS:              P.O. Box 1444
                                 San Carlos, CA 94070

Project:                         San Carlos Business Park

Description                      That six (6) building project totaling
                                 approximately 123,280 square feetcommonly
                                 known as San Carlos Business Park, San
                                 Carlos, California

LEASE TERMINATION:               Tenant, by this Addendum, terminates its right
                                 of use or occupancy as to 981 B and 981 D
                                 Industrial Road, San Carlos (approximately
                                 11,941 square feet +/-) as part of the demised
                                 Premises as of December 1,1997; Tenant shall
                                 pay the sum of $89,557.50 as a termination fee
                                 (an agreed upon sum based upon a calculation of
                                 six months' rent composed of six times the sum
                                 of $12,538.05 of monthly base rent and
                                 $2,388.20 of monthly CAM costs); Tenant shall
                                 leave the Premises in broom swept clean
                                 condition free of debris and shall return all
                                 keys to Landlord; all terms and conditions of
                                 the other existing leases between Landlord and
                                 Tenant shall remain the same except failure to
                                 make payment hereunder at time of execution
                                 shall constitute a default under all existing
                                 leases with Landlord and shall be treated as
                                 failure to pay Rent.

THREE SISTERS RANCH ENTERPRISES
"Landord"

/s/ Martin E. Ruberry
-------------------------------------
Martin E. Ruberry
General Manager

CONCEPTUS, INC.

By:   /s/ Kathryn Tunstall
   ----------------------------------
Kathryn Tunstall, President and CEO<PAGE>
                                                                   Exhibit 10.24

                              THREE SISTERS RANCH

                                  ENTERPRISES

                              THIRD LEASE ADDENDUM

     This Third Lease Addendum is entered into effective September 17, 1998 by
and between Three Sisters Ranch Enterprises, a California partnership
("Landlord") and Conceptus, Inc., a California corporation (Tenant").

     This Third Lease Addendum is attached to and forms a part of the Lease
identified below, together with any amendments, modifications and exhibits,
including a prior Lease Addendum and a prior Lease Addendum and Partial
Termination Agreement. This Third Lease Addendum constitutes additional
covenants and agreements which are intended to prevail in the event of any
conflict between the covenants and agreements contained in this Third Lease
Addendum and those contained in the Lease itself and/or the Lease Addenda.
Except for the additions, changes and removals listed herein, all other terms
and conditions of the Lease will remain in full force and effect throughout the
term of the Lease.

                                    Recitals

     A.   On or about April 15, 1997, Landlord and Tenant entered into a lease
("Lease"), for the certain premises owned by Landlord, and thereafter executed a
Lease Addendum and a Lease Addendum and Partial Termination Agreement. Tenant
currently occupies 16,397 square feet of 957 Industrial Road, Suites D, F, G, H,
J, L, P and R, San Carlos, California, 94070 (together, the "Premises"), that
are all part of a building complex more commonly known as the San Carlos
Business Center.

     B.   Tenant has notified Landlord that Tenant intends to sublease the
Premises, that Tenant intends to collect rent form the subtenant in an amount
("Excess Rent") in excess of the Rent due to Landlord under the Lease, and that
Tenant intends to enter into a separate agreement with the subtenant for the
leasing of furniture to be used in the Premises.

     C.   Tenant has also notified Landlord that Tenant has spent the sum of
$575,910 ("Tenant Costs") in tenant improvements for the Premises.

                              TERMS AND CONDITIONS

     1.   During the remaining Term of the Lease, for so long as Tenant is not
in material default under any of the provisions of the Lease (which default
remains uncured after the expiration of all applicable cure periods), Paragraph
21B shall be amended to read as follows:

<PAGE>

     B.   Bonus Rent. The rent collected by Tenant from the subtenant shall be
paid to the parties:

          1. The Rent due under the Lease shall be paid to Landlord.

          2.   That portion of Excess Rent up to and including $0.15 per square
               foot of the Premises shall be paid to Landlord ("Landlord's
               Share").

          3.   That portion of the Excess Rent in excess of Landlord's Share
               shall first be allocated and paid to Tenant to reimburse Tenant
               for (a) the costs of tenant improvements paid for by Tenant, not
               to exceed $575,910.00 ("Tenant Costs") and (b) any reasonable
               brokerage commission ("Commission") incurred by Tenant in
               connection with obtaining a sublease. Such Tenant Costs and
               Commission shall be amortized over the remaining Term of the
               Lease, and Tenant shall be paid a monthly amount of Excess Rent
               in excess of Landlord's Share based on such amortization
               ("Tenant's Share").

          4.   Any amount of Excess Rent in excess of Landlord's Share and
               Tenant's Share shall be divided and paid ten percent (10%) to
               Tenant and ninety percent (90%) to Landlord.

     2.   In the event that Tenant is in material default under any of the terms
of the Lease (which default remains uncured after the expiration of all
applicable cure periods), from and after written notice from Landlord, the
original Paragraph 21B, as set forth in the Lease, shall control the division of
Excess Rent and shall supercede and replace the revised Paragraph 21B as set
forth above in Paragraph 1 of this Third Lease Addendum.

     3.   The Option to Renew provided for in paragraph 43 of the Lease is
hereafter null and void and neither Tenant nor the subtenant shall have any
option to renew or extend the Term of this Lease.

IN WITNESS HEREOF, the Parties hereto have executed this Third Lease Addendum as
of the date set forth above.

         Three Sisters Ranch Enterprises        Conceptus, Inc.
         Landlord                               Tenant

         By: /s/ Martin Ruberry                 By: /s/ Sanford Fitch
            -----------------------------          -----------------------------
         Martin E. Ruberry                      Sanford Fitch
         General Manager                        Sr. VP & CFO

Date: September 21, 1998                        Date: September 17, 1998<PAGE>
                                                                    EXHIBIT 4.3
                            SUPPLEMENTAL INDENTURE

     SUPPLEMENTAL INDENTURE dated as of May 15, 2001, between TV Guide, Inc., a
Delaware corporation (the "Company"), on behalf of itself and each subsidiary
listed that is a Subsidiary Guarantor under the Original Indenture (as defined
below), and The Bank of New York, a New York banking corporation, as trustee
(the "Trustee").

                             W I T N E S S E T H

     WHEREAS, the Company and certain Subsidiary Guarantors have heretofore
executed and delivered to the Trustee an indenture (as supplemented by
supplemental indentures dated as of June 29, 1999, May 5, 2000 and April 6,
2001, the "Original Indenture") dated as of March 1, 1999;

     WHEREAS, the Company is a wholly-owned subsidiary of Gemstar-TV Guide
International, Inc., a Delaware corporation ("Parent");

     WHEREAS, Section 9.02 of the Original Indenture provides, among other
things, that, with the written consent of the Holders of not less than a
majority in aggregate principal amount of the Securities then outstanding, the
Company and the Trustee may amend the Original Indenture, except as provided
therein;

     WHEREAS, the 8% Senior Subordinated Notes due 2009 (the "Notes") constitute
the only Securities outstanding under the Original Indenture;

     WHEREAS, the Company desires to amend or delete certain provisions to the
Original Indenture;

     WHEREAS, all action on the part of the Company necessary to authorize its
execution, delivery and performance of the Original Indenture, as further
supplemented by this Supplemental Indenture, has been duly taken;

     WHEREAS, the Company has solicited the consent (the "Consent Solicitation")
of the Holders of the Notes to amendments (the "Amendments") to certain
provisions of the Indenture pursuant to that certain consent solicitation
statement dated May 14, 2001 (the "Consent Solicitation Statement");

     WHEREAS, Holders of at least a majority in aggregate principal amount of
the Notes have consented in writing to the Amendments; and

     WHEREAS, the Company and the Subsidiary Guarantors desire to execute and
deliver, and have requested the Trustee to join in the execution and delivery
of, this Supplemental Indenture for the purpose of amending certain provisions
of the Original Indenture.

     NOW THEREFORE, in consideration of the premises and for other good and
valuable consideration, it is mutually covenanted and agreed for the equal and
ratable benefit of all Holders of the Securities as follows:

<PAGE>
                                  ARTICLE ONE

                                   DEFINITION
                                   ----------

     Section 1.1 Definitions. When used herein, "Tender Offer Completion Event"
shall mean such time as each of the following events shall have occurred: (i)
Parent shall have completed a tender offer in accordance with the terms and
conditions set forth in the Consent Solicitation Statement and (ii) each holder
of Notes that has tendered Notes pursuant to the tender offer shall have
received the Purchase Price in exchange therefor as provided in the Consent
Solicitation Statement. All other capitalized terms used but not defined herein
shall have the same meanings as in the Original Indenture.

                                  ARTICLE TWO

                        AMENDMENTS TO ORIGINAL INDENTURE
                        --------------------------------

     Section 2.1 Deleted Definitions. Upon the occurrence of the Tender Offer
Completion Event, Sections 1.01 and 1.02 of the Original Indenture shall be
amended by deleting the definition of each term that is used in the Original
Indenture only in the Sections or subsections thereof that are deleted pursuant
to Section 2.2. hereof; provided, that, all definitions and cross-references
contained in Sections 4.06 and 4.10 of the Original Indenture shall be construed
in accordance with the meanings ascribed thereto under the Original Indenture as
in effect immediately prior to the date hereof (giving effect, however, to
events that have occurred on or subsequent to the date hereof).

     Section 2.2 Deleted Provisions. Upon the occurrence of the Tender Offer
Completion Event, the text of each of the following Articles, Sections,
subsections or clauses of the Original Indenture shall be deleted in its
entirety and replaced, in each case, by the words "Intentionally Omitted":

"Section 4.02. SEC Reports";

"Section 4.03. Limitation on Debt";

"Section 4.04. Limitation on Restricted Payments";

"Section 4.05. Limitation on Liens";

"Section 4.07. Limitation on Restrictions on Distributions from Restricted
               Subsidiaries";

"Section 4.08. Limitation on Transactions with Affiliates";

"Section 4.09. Limitation on Layered Debt";

"Section 4.12. Future Subsidiary Guarantors";

"Section 4.13. Maintenance of Non-Investment Company Status";

"Article V Surviving Company"; and

"Clauses (3), (4), (5), (6) and (8) of Section 8.02".

                                       2.

<PAGE>

     Section 2.3 Section 4.02 of the Original Indenture. Effective immediately
upon execution and delivery of this Supplemental Indenture by the parties
hereto, the following text shall be added to the end of Section 4.02 of the
Original Indenture:

     "Notwithstanding the foregoing, during the forty-five day period beginning
on May [insert fifth day prior to receipt of Requisite Consents], 2001, the
Company shall not be subject to the provisions of this Section 4.02. If the
Tender Offer Completion Event has not occurred by the end of such forty five-day
period, the Company shall, as soon as practicable thereafter, make such filings
and provide such information and documentation as would have been required under
Section 4.02 during such forty five-day period had the Company been subject
thereto during such forty five-day period."

     Section 2.4 Section 4.14 of the Original Indenture. Effective immediately
upon execution and delivery of this Supplemental Indenture by the parties
hereto, the text of Section 4.14 of the Original Indenture shall be deleted in
its entirety and replaced with the following text:

     "The Company and the Subsidiary Guarantors shall comply with TIA Section
314(a)(4)."

                                 ARTICLE THREE

                            MISCELLANEOUS PROVISIONS
                            ------------------------

     Section 3.1 Ratification of Indenture; Supplemental Indenture Part of
Indenture. Except as expressly amended hereby, the Indenture is in all respects
ratified and confirmed and all the terms, conditions and provisions thereof
shall remain in full force and effect. This Supplemental Indenture shall form a
part of the Indenture for all purposes, and every holder of Securities
heretofore or hereafter authenticated and delivered shall be bound hereby.

     Section 3.2 Governing Law. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED
BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK BUT
WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT
THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED
THEREBY.

     Section 3.3 Trustee Makes No Representation. The Trustee makes no
representation as to the validity or sufficiency of this Supplemental Indenture.

     Section 3.4 Counterparts. The parties may sign any number of copies of this
Supplemental Indenture. Each signed copy shall be an original, but all of them
together represent the same agreement.

     Section 3.5 Effect of Headings. The Section headings herein are for
convenience only and shall not effect the construction thereof.

                                       3.

<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be duly executed as of the date first written above.

                          TV GUIDE, INC., on behalf of itself and the Subsidiary
                          Guarantors

                          By:  /s/  Peter C. Boylan, III
                              -----------------------------
                              Peter C. Boylan, III
                              Co-Chairman & Chief Executive Officer, and Co-
                                President

                          THE BANK OF NEW YORK

                          By:  /s/  Van K. Brown
                              -----------------------------
                              Name:  Van K. Brown
                              Title: Vice President

                                       4.

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