Document:

Filed by sedaredgar.com - Canyon Copper Corp. - Exhibit 10.8

PROMISSORY NOTE 

	EXECUTED BY: 	CANYON COPPER CORP. 
	  	(the "Borrower") 
	 	 
	IN FAVOUR OF: 	ANTHONY R. HARVEY 
	  	(the "Lender") 
	 	 
	PRINCIPAL AMOUNT: 	CDN $25,000 
	 	 
	DATE OF EXECUTION: 	January 13, 2009 
	 	 
	PLACE OF EXECUTION: 	Vancouver, British Columbia
  

FOR VALUE RECEIVED the Borrower hereby promises to pay
to or to the order of the Lender on February 8, 2010, the principal sum of CDN
$25,000, together with interest thereon at the rate of 15% per annum, calculated
and compounded annually, both before and after maturity from the date hereof.

The Borrower waives presentment, demand, notice, protest and
notice of dishonour and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Promissory
Note. 

The Borrower agrees this Promissory Note may be negotiated,
assigned, discounted, or pledged by the Lender and in every case payment will be
made to the holder of this Promissory Note instead of the Lender upon notice
being given by the holder to the undersigned, and no holder of this Promissory
Note will be affected by the state of accounts between the undersigned and the
Lender or by any equities existing between the undersigned and the Lender and
will be deemed to be a holder in due course and for the value of the Promissory
Note held by him. 

DATED at Vancouver, British Columbia this 13th day of January,
2009. 

CANYON COPPER CORP. 
by its authorized signatory:

/s/ Kurt Bordian 
________________________________

KURT BORDIANFiled by sedaredgar.com - Canyon Copper Corp. - Exhibit 10.9

FIRST AMENDMENT TO LOAN AGREEMENT 

This First Amendment to the Loan Agreement dated July 7, 2008
(the “Loan Agreement”) between Anthony Harvey (the “Lender”) and
Canyon Copper Corp. (the “Borrower”) is made and entered into effective
as of the 13th day of January, 2009 (the "Effective Date"), between the Borrower
and the Lender. 

WHEREAS: 

A.          
The Borrower and the Lender entered into the Loan Agreement whereby the Lender
agreed to loan $25,000 (CDN) to the Borrower (the “Loan”). 

B.          
The Lender has agreed to extend the term of the Loan to April 7, 2010 on the
terms and conditions set out herein. 

NOW, THEREFORE, in consideration of the premises
contained herein and the sum of $10.00 paid by the Borrower to the Lender, the
receipt and sufficiency of which are hereby acknowledged, the parties agree to
amend the terms of the Loan Agreement as follows: 

	1. 	
      Definitions. Capitalized terms used in this
      Agreement shall have the same meaning as specified in the Loan Agreement
      unless the context clearly indicates the contrary.

	 	 	 
	2. 	
      Amendment. The Loan Agreement is hereby amended as
      follows:

	 	 	 
		(i) 	
      The term “Maturity” is replaced in its entirety with the
      following:

	 	 	 
			
      “Maturity” means April 7, 2010;

	 	 	 
		(ii) 	
      Section 2.1 of the Loan Agreement is replaced in its
      entirety with the following:

“2.1         
 Loan and Repayment. The Lender hereby agrees to lend to the
Borrower the Principal Sum of $25,000 (CDN). The Loan shall be made in United
States currency and shall be repaid by the Borrower on or before April 7, 2010.”

	 	(iii) 	
      The Promissory Note evidencing the Loan Agreement is
      hereby replaced in its entirety with the Promissory Note attached hereto
      as Schedule “A” to this Agreement.

	3. 	
      No Other Modification. The parties confirm that
      the terms, covenants and conditions of the Assignment Agreement remain
      unchanged and in full force and effect, except as modified by this
      Agreement.

	 	 
	4. 	
      Counterparts. This Agreement may be executed in
      two or more counterparts, each of which shall constitute an original, but
      all of which, when taken together, shall constitute but one instrument,
      and shall become effective when one or more counterparts have been signed
      by each party hereto and delivered to the other parties.

	 	 
	5. 	
      Successors and Assigns. Except as otherwise
      expressly provided herein, the provisions hereof shall inure to the
      benefit of, and be binding upon, the successors, assigns, heirs, executors
      and administrators of the parties hereto.

2

	6. 	
      Entire Agreement. This Agreement constitutes the
      full and entire understanding and agreement between the parties with
      regard to the subject hereof.

IN WITNESS WHEREOF, the parties have duly executed and
delivered this Agreement as of the date first written above. 

THE BORROWER:

CANYON COPPER CORP. 
by its authorized signatory:

/s/ Kurt Bordian 
________________________________

Kurt Bordian 

THE LENDER: 

SIGNED, SEALED AND DELIVERED 
BY ANTHONY HARVEY

in the presence of: 

	/s/ James E.
      Yates 	 	/s/
      Anthony Harvey 
	Signature 	 	ANTHONY HARVEY 
	 	 	 
	James E. Yates 	 	  
	Name 	 	  
	 	 	 
	371 Newdale Crt	 	  
	Address 	 	  
	 	 	 
	North Vancouver,
    BC	 	  

Schedule “A” 

Promissory Note 

PROMISSORY NOTE 

	EXECUTED BY: 	CANYON COPPER CORP. 
	  	(the "Borrower") 
	 	 
	IN FAVOUR OF: 	ANTHONY R. HARVEY 
	  	(the "Lender") 
	 	 
	PRINCIPAL AMOUNT: 	CDN $25,000 
	 	 
	DATE OF EXECUTION: 	January 13, 2009 
	 	 
	PLACE OF EXECUTION: 	Vancouver, British Columbia
  

FOR VALUE RECEIVED the Borrower hereby promises to pay
to or to the order of the Lender on April 7, 2010, the principal sum of CDN
$25,000, together with interest thereon at the rate of 15% per annum, calculated
and compounded annually, both before and after maturity from the date hereof.

The Borrower waives presentment, demand, notice, protest and
notice of dishonour and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Promissory
Note. 

The Borrower agrees this Promissory Note may be negotiated,
assigned, discounted, or pledged by the Lender and in every case payment will be
made to the holder of this Promissory Note instead of the Lender upon notice
being given by the holder to the undersigned, and no holder of this Promissory
Note will be affected by the state of accounts between the undersigned and the
Lender or by any equities existing between the undersigned and the Lender and
will be deemed to be a holder in due course and for the value of the Promissory
Note held by him. 

DATED at Vancouver, British Columbia this 13th day of January,
2009. 

CANYON COPPER CORP. 
by its authorized signatory:

________________________________ 
KURT BORDIANFiled by sedaredgar.com - Canyon Copper Corp. - Exhibit 10.10

PROMISSORY NOTE 

	EXECUTED BY: 	CANYON COPPER CORP. 
	  	(the "Borrower") 
	 	 
	IN FAVOUR OF: 	ANTHONY R. HARVEY 
	  	(the "Lender") 
	 	 
	PRINCIPAL AMOUNT: 	CDN $25,000 
	 	 
	DATE OF EXECUTION: 	January 13, 2009 
	 	 
	PLACE OF EXECUTION: 	Vancouver, British Columbia
  

FOR VALUE RECEIVED the Borrower hereby promises to pay
to or to the order of the Lender on April 7, 2010, the principal sum of CDN
$25,000, together with interest thereon at the rate of 15% per annum, calculated
and compounded annually, both before and after maturity from the date hereof.

The Borrower waives presentment, demand, notice, protest and
notice of dishonour and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Promissory
Note. 

The Borrower agrees this Promissory Note may be negotiated,
assigned, discounted, or pledged by the Lender and in every case payment will be
made to the holder of this Promissory Note instead of the Lender upon notice
being given by the holder to the undersigned, and no holder of this Promissory
Note will be affected by the state of accounts between the undersigned and the
Lender or by any equities existing between the undersigned and the Lender and
will be deemed to be a holder in due course and for the value of the Promissory
Note held by him. 

DATED at Vancouver, British Columbia this 13th day of January,
2009. 

CANYON COPPER CORP. 
by its authorized signatory:

/s/ Kurt Bordian 
________________________________

KURT BORDIANExhibit A

                                     Option
                                   (Attached)

<PAGE>

                                 AMENDMENT NO. 1
                                    TO OPTION

     This  Amendment  No. 1 is made as of October 16, 2008 between  Zynex,  Inc.
(formerly known as Zynex Medical Holdings, Inc.)
(the "Company") and Stalwart Investments, LLC ("Stalwart").

                                    RECITALS

         On  September  27,  2004,  the Company  granted to Stalwart  the Option
attached as Exhibit A (the  "Option").  Stalwart  has  exercised  the Option for
100,000 shares at the exercise price of $0.40 per share.  There remains  subject
to the Option,  prior to this Amendment,  a total of 1,800,000  shares of common
stock of the  Company  at an  exercise  price  from $1.75 per share to $4.00 per
share. The parties wish to amend the Option as stated in this Amendment.

                                    AGREEMENT

         In consideration  of the amendments  stated below, the parties agree as
follows.

1.       Cashless Exercise.

     (a)  The holder of the (Option may exercise in whole or part,  from time to
          time prior to the  expiration  date,  by  delivery to the Company of a
          duly executed  Notice of Exercise,  the following  parts of the Option
          (a) for cash or (b) by conversion in a cashless  exercise as explained
          below:

                                    400,000 at $1.75 each
                                    200,000 at $2.00 each
                                    200,000 at $2.25 each
                                    200,000 at $2.50 each

     (b)  In any such a cashless  exercise,  the holder may  convert  any of the
          above  listed  parts of the  Option  into a number  of  shares  of the
          Company  commons tock  determined by dividing (a) the  aggregate  fair
          market  value of the shares of common  stock of the  Company for which
          the Option is being  exercised  and are  otherwise  issuable  upon the
          exercise  of the  Option  minus the  aggregate  exercise  price of the
          shares for which the Option is being  exercised by (b) the fair market
          value  of  one  share  of  common  stock  of the  Company.  (c) If the
          Company's  common stock is traded in a public market,  the fair market
          value of each share of common  stock shall be the  closing  price of a
          share  reported  for the business  day  immediately  before the holder
          delivers  its Notice of  Exercise  to the  Company.  If the  Company's
          common stock is traded in a public market but there is no such closing
          price,  then the fair market value shall be the average of the closing
          bid and asked prices reported for the business day immediately  before
          the delivery of such Notice of Exercise. If the Company's stock is not
          traded in a public market, the Board of Directors of the company shall
          determine the fair market value in its reasonable  good faith judgment
          as of the  business  day  immediately  before the holder  delivers its
          Notice of Exercise to the Company. (d) The Notice of Exercise shall be
          in the form of notice attached as Exhibit B.

2.       Cancellation of Part of the Option

          (a)  The  Company  and  Stalwart  agree  that,  as of the date of this
               Amendment, the following parts of the Option are hereby cancelled
               and may not be exercised in any manner:

                           200,000 at $2.75 each
                           200,000 at $3.00 each
                           200,000 at $3.50 each

          (b)  The following part of the Option shall remain  exercisable by the
               holder for cash only:

                           200,000 at $4.00 each

         3.  Confirmation.  The Company  and  Stalwart  confirm  that the Option
attached  hereto as Exhibit A as amended by  Sections 1 and 2 above  constitutes
the  entire  Option  and that no  consideration  other  than as  stated  in this
Amendment has been provided by the Company or Stalwart for the changes stated in
this Amendment.

         The parties  have  executed  this  Amendment  effective  as of the date
stated above.

                             ZYNEX, INC.

                         By: __________________________
                             Name: Thomas Sandgaard
                             Title: President and Chief Executive Officer

                            STALWART INVESTMENT, LLC

                         By: ___________________________
                             Name: Aaron Lamkin
                             Title: Managing Member
October 20, 2008

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00152-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00152-of-00352.parquet"}], [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00152-of-00352.parquet"}], [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00152-of-00352.parquet"}]]