Document:

Exhibit
10.13

PROMISSORY
NOTE (“NOTE”) - 0% SIMPLE INTEREST

 

 

$150

9/09/2020

 

 

For
VALUE RECEIVED, SYBLEU INC. (“Borrower”) promises to pay to David R. Koos (“Lender”) the principal sum
of $150 with no interest to accrue on the balance. The said principal shall be payable in lawful money of the United States of
America at the demand of the Lender. This Note may be prepaid in whole or in part at any time without premium or penalty. The
Borrower hereby waives any notice of the transfer of this Note by the Lender or by any subsequent holder of this Note, agrees
to remain bound by the terms of this Note subsequent to any transfer, and agrees that the terms of this Note may be fully enforced
by any subsequent holder of this Note. All terms and conditions of this Note shall be interpreted under the laws of the state
of California and venue shall be the state of California.

 

 

SYBLEU
INC.( Borrower)

 

By:/s/
David R Koos

 

CHAIRMAN
AND CEO

 

Accepted
By:

 

DAVID
R KOOS (Lender)

 

By:/s/
David R. Koos

 

DAVID
R. KOOSExhibit
10.14

 

PROMISSORY
NOTE (“NOTE”) - 0% SIMPLE INTEREST

 

 

$500

9/09/2020

 

 

For
VALUE RECEIVED, SYBLEU INC. (“Borrower”) promises to pay to David R. Koos (“Lender”) the principal sum
of $500 with no interest to accrue on the balance. The said principal shall be payable in lawful money of the United States of
America at the demand of the Lender. This Note may be prepaid in whole or in part at any time without premium or penalty. The
Borrower hereby waives any notice of the transfer of this Note by the Lender or by any subsequent holder of this Note, agrees
to remain bound by the terms of this Note subsequent to any transfer, and agrees that the terms of this Note may be fully enforced
by any subsequent holder of this Note. All terms and conditions of this Note shall be interpreted under the laws of the state
of California and venue shall be the state of California.

 

 

SYBLEU
INC.( Borrower)

 

By:/s/
David R Koos

 

CHAIRMAN
AND CEO

 

Accepted
By:

 

DAVID
R KOOS (Lender)

 

By:/s/
David R. Koos

 

DAVID
R. KOOSExhibit
10.15

 

PROMISSORY
NOTE (“NOTE”) - 0% SIMPLE INTEREST

 

 

$500

9/17/2020

 

 

For
VALUE RECEIVED, SYBLEU INC. (“Borrower”) promises to pay to David R. Koos (“Lender”) the principal sum
of $500 with no interest to accrue on the balance. The said principal shall be payable in lawful money of the United States of
America at the demand of the Lender. This Note may be prepaid in whole or in part at any time without premium or penalty. The
Borrower hereby waives any notice of the transfer of this Note by the Lender or by any subsequent holder of this Note, agrees
to remain bound by the terms of this Note subsequent to any transfer, and agrees that the terms of this Note may be fully enforced
by any subsequent holder of this Note. All terms and conditions of this Note shall be interpreted under the laws of the state
of California and venue shall be the state of California.

 

 

SYBLEU
INC.( Borrower)

 

By:/s/
David R Koos

 

CHAIRMAN
AND CEO

 

Accepted
By:

 

DAVID
R KOOS (Lender)

 

By:/s/
David R. Koos

 

DAVID
R. KOOSExhibit
10.16

 

PROMISSORY
NOTE (“NOTE”) - 0% SIMPLE INTEREST

 

 

$500

9/23/2020

 

 

For
VALUE RECEIVED, SYBLEU INC. (“Borrower”) promises to pay to David R. Koos (“Lender”) the principal sum
of $500 with no interest to accrue on the balance. The said principal shall be payable in lawful money of the United States of
America at the demand of the Lender. This Note may be prepaid in whole or in part at any time without premium or penalty. The
Borrower hereby waives any notice of the transfer of this Note by the Lender or by any subsequent holder of this Note, agrees
to remain bound by the terms of this Note subsequent to any transfer, and agrees that the terms of this Note may be fully enforced
by any subsequent holder of this Note. All terms and conditions of this Note shall be interpreted under the laws of the state
of California and venue shall be the state of California.

 

 

SYBLEU
INC.( Borrower)

 

By:/s/
David R Koos

 

CHAIRMAN
AND CEO

 

Accepted
By:

 

DAVID
R KOOS (Lender)

 

By:/s/
David R. Koos

 

DAVID
R. KOOSExhibit
10.17

 

PROMISSORY
NOTE (“NOTE”) - 0% SIMPLE INTEREST

 

 

$500

9/30/2020

 

 

For
VALUE RECEIVED, SYBLEU INC. (“Borrower”) promises to pay to David R. Koos (“Lender”) the principal sum
of $500 with no interest to accrue on the balance. The said principal shall be payable in lawful money of the United States of
America at the demand of the Lender. This Note may be prepaid in whole or in part at any time without premium or penalty. The
Borrower hereby waives any notice of the transfer of this Note by the Lender or by any subsequent holder of this Note, agrees
to remain bound by the terms of this Note subsequent to any transfer, and agrees that the terms of this Note may be fully enforced
by any subsequent holder of this Note. All terms and conditions of this Note shall be interpreted under the laws of the state
of California and venue shall be the state of California.

 

 

SYBLEU
INC.( Borrower)

 

By:/s/
David R Koos

 

CHAIRMAN
AND CEO

 

Accepted
By:

 

DAVID
R KOOS (Lender)

 

By:/s/
David R. Koos

 

DAVID
R. KOOSExhibit
10.18

 

PROMISSORY
NOTE (“NOTE”) - 0% SIMPLE INTEREST

 

 

$500

10/07/2020

 

 

For
VALUE RECEIVED, SYBLEU INC. (“Borrower”) promises to pay to David R. Koos (“Lender”) the principal sum
of $500 with no interest to accrue on the balance. The said principal shall be payable in lawful money of the United States of
America at the demand of the Lender. This Note may be prepaid in whole or in part at any time without premium or penalty. The
Borrower hereby waives any notice of the transfer of this Note by the Lender or by any subsequent holder of this Note, agrees
to remain bound by the terms of this Note subsequent to any transfer, and agrees that the terms of this Note may be fully enforced
by any subsequent holder of this Note. All terms and conditions of this Note shall be interpreted under the laws of the state
of California and venue shall be the state of California.

 

 

SYBLEU
INC.( Borrower)

 

By:/s/
David R Koos

 

CHAIRMAN
AND CEO

 

Accepted
By:

 

DAVID
R KOOS (Lender)

 

By:/s/
David R. Koos

 

DAVID
R. KOOSExhibit
10.19

 

PROMISSORY
NOTE (“NOTE”) - 0% SIMPLE INTEREST

 

 

$500

10/15/2020

 

 

For
VALUE RECEIVED, SYBLEU INC. (“Borrower”) promises to pay to David R. Koos (“Lender”) the principal sum
of $500 with no interest to accrue on the balance. The said principal shall be payable in lawful money of the United States of
America at the demand of the Lender. This Note may be prepaid in whole or in part at any time without premium or penalty. The
Borrower hereby waives any notice of the transfer of this Note by the Lender or by any subsequent holder of this Note, agrees
to remain bound by the terms of this Note subsequent to any transfer, and agrees that the terms of this Note may be fully enforced
by any subsequent holder of this Note. All terms and conditions of this Note shall be interpreted under the laws of the state
of California and venue shall be the state of California.

 

SYBLEU
INC.( Borrower)

 

By:/s/
David R Koos

 

CHAIRMAN
AND CEO

 

Accepted
By:

 

DAVID
R KOOS (Lender)

 

By:/s/
David R. Koos

 

DAVID
R. KOOSExhibit
10.20

 

PROMISSORY
NOTE (“NOTE”) - 0% SIMPLE INTEREST

 

 

$150

10/15/2020

 

 

For
VALUE RECEIVED, SYBLEU INC. (“Borrower”) promises to pay to David R. Koos (“Lender”) the principal sum
of $150 with no interest to accrue on the balance. The said principal shall be payable in lawful money of the United States of
America at the demand of the Lender. This Note may be prepaid in whole or in part at any time without premium or penalty. The
Borrower hereby waives any notice of the transfer of this Note by the Lender or by any subsequent holder of this Note, agrees
to remain bound by the terms of this Note subsequent to any transfer, and agrees that the terms of this Note may be fully enforced
by any subsequent holder of this Note. All terms and conditions of this Note shall be interpreted under the laws of the state
of California and venue shall be the state of California.

 

 

SYBLEU
INC.( Borrower)

 

By:/s/
David R Koos

 

CHAIRMAN
AND CEO

 

Accepted
By:

 

DAVID
R KOOS (Lender)

 

By:/s/
David R. Koos

 

DAVID
R. KOOSExhibit 10.21 

Page 1 of 2

ASSIGNMENT

Whereas, I, David Koos,
an individual residing in La Mesa, CA, referred to herein as ASSIGNOR, has invented new and useful innovations described in:

U.S. Provisional Application
No. 63/051,789, entitled: IMPROVING QUALITY OF A CELLULAR GRAFT, filed on July 14'', 2020;

herein referred to as
the"Invention";

And Whereas, Entest BioMedical
Inc., a California corporation, located at 4700 Spring St., Suite 304, La Mesa, CA, 91942 herein referred to as ASSIGNEE, desires
to acquire the entire right, title, and interest in and to the said Invention,

Now therefore, for good
and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, ASSIGNOR hereby acknowledges that they
have sold,assigned, transferred, and set over, and by these presents do hereby sell, assign, and transfer, and set over unto ASSIGNEE
and its successors and assigns, !00% of the following:

(A) ASSIGNOR'S right,
title and interest in and to the Invention;

(B) any domestic, foreign,
or reissue patents that claim priority to U.S Provisional Application No. 63/051,789,

(C) any continuations,
continuations-in-part, substitutes, or divisional applications, foreign or domestic, that claim priority U.S. Provisional Application
No. 63/051,789;

ASSIGNOR authorizes and
requests the Commissioner for Patents to issue any resulting patent(s) as follows: 0% to ASSIGNOR and 100% to ASSIGNEE.

ASSIGNOR hereby further
sells, assigns, transfers and sets over unto ASSIGNEE, 100% of ASSIGNOR'S entire right, title, and interest in and to said invention
in the United States and every country foreign to the United

    	 	1	 

     

    

Page 2 of 2

States. ASSIGNOR agrees
to execute all papers, give any required testimony, and perform other lawful acts, at ASSIGNEE'S expense, as ASSIGNEE may require
to enable ASSIGNEE to perfect ASSIGNEE'S interest in any resulting patent of the United States and countries foreign thereto,
and to acquire, hold, enforce, convey, and uphold the validity of said patent and reissues and extensions thereof, and ASSIGNEE'S
interest therein.

In testimony whereof
ASSIGNOR intending to be legally bound hereunto affix their signatures.

ASSIGNOR

	/s/ David Koos	 	07/14/2020
	(David Koos)	 	(Date)
	 	 	 
	 	 	 
	 	 	 

 

    	 	2	 

     

    

 

Page 1 of 2

ASSIGNMENT

Whereas, Entest BioMedical
Inc., a California corporation, located at 4700 Spring St., Suite 304, La Mesa, CA, 91942, referred to herein as ASSIGNOR, is
the owner of new and useful innovations described in:

U.S. Provisional Application
No. 63/051,789, entitled : IMPROVING QUALITY OF A CELLULAR GRAFT, filed on July 14'°, 2020;

U.S. Provisional Application
No. 61/319,214, entitled: IMPROVING QUALITY OF A CELLULAR GRAFT, filed on March 30'', 2010

herein collectively referred
to as the "Invention";And Whereas, Sybleu inc., a Wyoming corporation, located at 4700 Spring St., Suite 304, La Mesa, CA, 91942
herein referred to as ASSIGNEE, desires to acquire the entire right, title, and interest in and to the said Invention,

Now therefore, for good
and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, ASSIGNOR hereby acknowledges that they
have sold, assigned, transferred, and set over, and by these presents do hereby sell, assign, and transfer, and set over unto
ASSIGNEE and its successors and assigns. 100% of the following:

(A) ASSIGNOR'S right,
title and interest in and to the Invention;

(B) any domestic, foreign,
or reissue patents that claim priority to U.S. Provisional Application No. 63/051,789 and U.S. Provisional Application No. 61/319,214,

(C) any continuations,
continuations-in-part, substitutes, or divisional applications, foreign or domestic, that claim priority to U.S. Provisional Application
No. 63/051,789 and U.S. Provisional Application No. 61/319,214;

    	 	3	 

     

    

 

Page 2 of 2

ASSIGNOR authorizes and
requests the Commissioner for Patents to issue any resulting patent(s) as follows: 0% to ASSIGNOR and 100% to ASSIGNEE.

ASSIGNOR hereby further
sells, assigns, transfers and sets over unto ASSIGNEE, 100% of ASSIGNOR'S entire right, title, and interest in and to said invention
in the United States and every country foreign to the United States. ASSIGNOR agrees to execute all papers, give any required
testimony, and perform other lawful acts, at ASSIGNEE'S expense, as ASSIGNEE may require to enable ASSIGNEE to perfect ASSIGNEE'S
interest in any resulting patent of the United States and countries foreign thereto, and to acquire, hold, enforce, convey, and
uphold the validity of said patent and reissues and extensions thereof, and ASSIGNEE'S interest therein.

In testimony whereof
ASSIGNOR intending to be legally bound hereunto affix their signatures.

ASSIGNOR

	/s/ David Koos	 	07/15/2020
	(David Koos)	 	(Date)
	 	 	 
	 	 	 
	 	 	 

    	 	4

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