Document:

CONTRACT OF SALE

                                                                   Exhibit 10.20

Date:    February       , 2002

Seller and Purchaser agree as follows:

Seller:  American BioMedica Corporation
         ------------------------------
Address: 122 Smith Road
         --------------
Kinderhook, NY 12106
--------------------

Purchaser: Robert L. Mink Jr.
           ------------------
Address: Valatie, New York 12184
         -----------------------

1.   Seller shall sell and Purchaser  shall buy the Property on the terms stated
     in this Contract.

2.   The Property is described as follows:

ALL that  certain  tract piece or parcel of land with the  improvements  thereon
situate,  lying and being in the Town of Stuyvesant,  Columbia County,  New York
shown on the map annexed hereto and consisting of 85.35 acres.

The sale includes:

       (a) All buildings and improvements on the Property

       (b) All right, title and interest, if any, of Seller in any land lying in
the bed of any street or highway,  opened or proposed,  in front of or adjoining
the Property to the center line thereof. It also includes any right of Seller to
any  unpaid  aware  to  which  Seller  may be  entitled  (1)  due to  taking  by
condemnation of any right, title or interest of Seller and (2) for any damage to
the  Property  due to change  of grade of any  street or  highway.  Seller  will
deliver to Purchaser at Closing,  or thereafter,  on demand,  proper instruments
for the  conveyance of title and the  assignment  and collection of the award or
damages.

       (c) All fixtures and articles of personal property attached to or used in
connection  with  the  Property,  unless  specifically  excluded  below.  Seller
represents that they are paid for and owned by Seller free and clear of any lien
other  than the  Existing  Mortgage(s).  They  include  but are not  limited  to
plumbing,  heating,  lighting and cooking  fixtures,  fire,  smoke,  and burglar
alarms, radio and television aerials,  blinds, shades,  screens,  awnings, storm
windows, window boxes, storm doors, mail boxes, weather vanes, flagpoles, pumps,
shrubbery, clothes washers, clothes dryers, garbage disposal units, wall to wall
carpeting and shed.

Excluded from the sale are:

      Furniture and household furnishings

3.    The purchase price is.........................................$ 150,000.00

      payable as follows:
      Initial Deposit...............................................$  15,000.00

      On the signing of this Contract by check subject to
      Collection held by............................................$

      By allowance for the principal amount still unpaid
      on the existing mortgage......................................$__,__.__

      By a Purchase Money Note and Mortgage from
      Purchaser (or assigns) to Seller:.............................$__,__.__

      BALANCE AT CLOSING............................................$135,000.00

<PAGE>

The  BALANCE  AT  CLOSING  shall  be paid in cash or good  certified  check,  or
official check of any bank,  savings bank,  trust  company,  or savings and loan
association  having a banking  office in the State of New York.  A check must be
payable to the order of Seller,  or to the order of Purchaser  and duly endorsed
by  Purchaser  (if  other  than a  corporation)  to the  order of  Seller in the
presence of Seller or Seller's attorney.

4.   The  Property  will  be  conveyed  subject  to the  continuing  lien of the
     following mortgage ("Existing Mortgage"):

     Mortgage now in the unpaid principal  amount of $............  and interest
     at the rate of _____% per year,  presently payable in  ....installments  of
     $............which  includes principal,  interest,  and with any balance of
     principal being due and payable on ____________.

<PAGE>

5.   If a purchase  money note and  mortgage is to be given it shall be drawn by
     the attorney for the Seller. Purchaser shall pay for the mortgage recording
     tax,  recording fees and the charge for drawing the note and mortgage.  The
     purchase  money note and  mortgage  shall  provide  that it will  always be
     subject to the prior lien of any Existing Mortgage even though the Existing
     Mortgage is extended, consolidated or refinanced in good faith.

6.   The Property is to be conveyed subject to:

     (a)  Applicable zoning and governmental regulations that affect the use and
          maintenance  of the  Property  provided  that they are not violated by
          buildings  and   improvements   on  the  Property.

     (b)  Conditions, agreements, restrictions and easements of record.

     (c)  Any state of facts and  inspection  or survey of the Property may show
          it does not make the title to the Property unmarketable.

     (d)  Existing tenancies.

     (e)  Unpaid assessments payable after the date of the transfer of title.

7.   Seller may pay and discharge any liens or encumbrances  not provided for in
     this  Contract.  Seller may make payment out of the balance of the Purchase
     paid by Purchaser on the transfer of title.

8.   At the Closing  Seller  shall  deliver to Purchaser a Bargain and Sale with
     Covenant  deed so as to convey a fee simple title to the Property  free and
     clear of all encumbrances except as stated in this Contract. The deed shall
     be prepared,  signed and  acknowledged by Seller and transfer tax stamps in
     the correct amount shall be affixed to the deed,  all at Seller's  expense.
     The deed shall contain a trust fund clause as required by Section 13 of the
     Lien Law.

9.   The following are to be apportioned pro-rata to the date of transfer:

     (a)  Rents as and when collected

     (b)  Interest on the Existing Mortgage

     (c)  Taxes,  water  rates and sewer  rates  based on the fiscal  period for
          which assessed.

     (d)  Premiums on existing  transferable  insurance policies and renewals on
          those expiring prior to closing.

     (e)  Fuel, if any.

10.  If there is a water meter on the  Property,  Seller shall furnish a reading
     to a date not more  than  thirty  days  prior  to the time  herein  set for
     Closing.  The  unfixed  meter  charge  and  sewer  rent,  if any,  shall be
     apportioned on the basis of this last reading.

11.  This  Contract  does not provide  for what  happens in the event of fire or
     casualty loss before the title closing.  Unless different provision is made
     in this Contract, Section 5-1311 of the General Obligations Law will apply.

12.  Purchaser has inspected the building and  improvements  on the Property and
     the personal property included in this sale. Purchaser agrees to take title
     "as is" and in  their  present  condition  subject  to  reasonable  use and
     natural deterioration between now and the time of closing.

13.  If  Seller is unable to  convey  title in  accordance  with this  Contract,
     Seller's  only  liability  is to refund  all money  paid on account of this
     Contract and pay charges made for examining title.

14.  The Closing will take place at the office of the Seller's attorney at 10:00
     AM on or before April 1, 2002

15.  Purchaser has not dealt with any broker in connection with this sale.

16.  All money paid on account of this Contract,  and the reasonable expenses of
     examination  of the title to the Property  and of any survey or  inspection
     charges are hereby made liens on the Property. The liens shall not continue
     after default by Purchaser.

17.  Any notice or other  communication  from one party to the other shall be in
     writing and sent by  registered  or certified  mail in a postpaid  envelope
     addressed  to the party at the  address  above.  The  address  above may be
     changed by notice to the other party.

18.  All prior  understandings  and agreements  between Seller and Purchaser are
     merged in this  Contract.  This Contract  completely  expresses  their full
     agreement and has been entered into after full investigation. Neither party
     is  relying  upon  statements  made by  anyone  that is not a party to this
     Contract.

19.  This Contract may not be changed or ended orally.

20.  This  Contract  shall  apply  to  and  bind  the  distributes,   executors,
     administrators, successors and assigns of the Seller and Purchaser.

21.  If there are more than one  Purchase  or Seller the words  "Purchaser"  and
     "Seller" used in this Contract includes them.

22.  See attached Rider.

<PAGE>

Seller and  Purchaser  have  signed  this  Contract as of the date at the top of
first page.

WITNESS                                                    SELLER

                                             American BioMedica Corporation
------------------------------------         ----------------------------------
                                             /s/ Stan Cipkowski
                                             ----------------------------------

                                                           PURCHASER

                                             /s/ Robert L. Mink Jr.
                                             ----------------------------------
                                             Robert L. Mink Jr.

<PAGE>

                  RIDER TO CONTRACT AMERICAN BIOMEDICA TO MINK

1.   The parties  hereto  agree that the  purchase  price shall be  allocated as
     follows:

     A.   For the purchase of the land $86,000 and;

     B.   For the purchase of the time on the land $64,000

2.   The parties  agree that the  contract  deposit of $15,000  shall be held in
     escrow by William J. Better, attorney for Seller.

3.   The  obligations of the Seller herein are contingent  upon and obtaining at
     its own  expense a variance  from the Town of  Stuyvesant  Zoning  Board of
     Appeals and a  sub-division  approval from the Town of Stuyvesant  Planning
     Board to convey the property  contemplated to be sole herein.  Seller shall
     use all due  diligence  to try and  effectuate  this  transfer  in a timely
     fashion.  Seller shall be responsible  for the costs  associated  with that
     transfer  except any costs  associated  with a percolation  test for septic
     suitability  for the location of a single family  residence on the contract
     premises. Such cost, if required or desired by the purchaser shall be borne
     by the purchaser solely.

4.   In addition to  conveying  the 83.35 acres  Seller shall convey an easement
     shown on the map annexed  hereto as Exhibit A. Seller shall be  responsible
     for all costs associated with the conveyance of that easement.

5.   The  transfer of title shall take place on or about April 1, 2002 or within
     30 days  after the  obtaining  of the  necessary  approvals  to convey  the
     property as herein contemplated.

                                             American BioMedica Corporation

                                             By:  /s/ Stan Cipkowski
                                                -------------------------------

                                                 /s/ Robert L. Mink Jr.
                                                -------------------------------
                                                Robert L. Mink Jr.

<PAGE>Exhibit 10.21

June 19, 2003

Dear Mr. Cipkowski:

The following is our agreement  under which you will  continue  employment  with
American Bio Medica Corporation (ABMC) as Director of Sales of NYS Probation and
Parole and  School  District  Development,  effective  as of June 19,  2003 (the
"Commencement  Date").  This agreement  supercedes all other agreements  whether
written or verbal and may not be amended  except as in writing signed by you and
an authorized  senior officer of ABMC. You will report directly to the President
of ABMC and your office will be located in your residence.

TERM

Your employment with ABMC will be at will.

SALARY AND COMMISSION

Your base salary will be $15,000 per month,  for the period July 1, 2003 through
December  31,  2003.  Effective  January 1, 2004 your  salary will be $8,333 per
month,  which is  equivalent to $100,000 on an  annualized  basis.  In addition,
effective  January  1, 2004 you will  receive a  commission  equal to 12% of all
sales to NYS  Probation  and Parole and School  Districts to which you sell ABMC
products.  The commission  percentage will be reduced by 1% increments for every
1% below a blended  gross margin at which sales to the NYS  Probation and Parole
and School  Districts  are made below 45% (i.e.  if the blended  gross margin of
sales to these  entities is 43% you will receive a 10%  commission  on sales [2%
less 2%]).  ABMC will  reimburse all  reasonable  business  related  expenses as
approved by the Chief Financial Officer.

BENEFITS

Benefits include:

o     20 vacation days o Usual corporate holidays
o     401 (k)
o     Health insurance equal to other ABMC executive officers

SEVERANCE

In the  unlikely  event that the Board of  Directors of ABMC elects to terminate
your employment for anything other than cause,  including  failure to renew this
agreement,  (defined  as  commission  of  a  crime  (other  than  minor  traffic
offenses),  acts of dishonesty,  fraud or  malfeasance  in connection  with your
service on behalf of the Company,  gross dereliction of duty, willful failure to

<PAGE>

carry out any lawful directive of the Board of Directors, or material violations
of Company  policies)  you will receive  severance  pay equal to 12 months at an
annualized salary of $180,000,  with continuation of all medical benefits during
the twelve-month  period.  The severance  payment will be made under the current
pay cycle, each pay period, during the 12 months. All unvested options will vest
immediately  upon your  separation  from the Company  and remain  vested for the
duration of their  pre-established term, 10 years. Further, ABMC will indemnify,
or  continue to  indemnify,  you to the full  extent  permitted  by the New York
Business Corporation Law if you are, or become, a party to a matter by reason of
being or having been a director or officer of ABMC.  The  obligations of ABMC in
this  paragraph  shall  be  binding  upon  and  become  the  obligations  of any
successors or assigns of ABMC.

Additionally,  you may elect to exercise this severance provision at your option
under the following circumstances:

o     If you are  required to relocate  by the Board of  Directors  of ABMC as a
      condition of continued  employment,  defined as moving your primary office
      more than 25 miles from its current location in Kinderhook, New York.
o     A substantial change in  responsibilities at the direction of the Board of
      Directors of the responsibilities normally assumed by your position (i.e.,
      demotion); or
o     Change in control of the Company, (i.e., if the Company is acquired wholly
      or if another corporate entity becomes the controlling shareholder)

RESTRICTIVE COVENANTS

      NON-SOLICITATION

During the twelve  (12)  months  immediately  following  your  termination  from
employment with ABMC for any reason, you agree that:

o     you will not,  directly or indirectly,  accept or solicit in any manner or
      capacity whatsoever, including by way of illustration, but not limitation,
      call upon,  mail or e-mail  notices  to, or make  telephone  calls to, any
      Customer (defined below) or Customer Prospect (defined below) of ABMC, for
      the purpose of selling any Covered Services (defined below) or engaging in
      any business  which  directly or  indirectly  competes  with ABMC drugs of
      abuse testing products or services east of the Mississippi River.

o     you will not  solicit,  endeavor  to entice away from ABMC,  or  otherwise
      interfere  with the  relationship  of ABMC with any person who is employed
      (or, but for any violation of this agreement, would have been employed) by
      or otherwise  engaged to perform  services for ABMC,  whether for your own
      account or for the account of any other person or entity.

<PAGE>

CONFIDENTIALITY

You agree not to disclose any Confidential  Information  (defined below) and you
promise  to  take  all  reasonable   precautions  to  prevent  its  unauthorized
dissemination, both at all times during your employment with ABMC and after your
employment. You agree to limit the disclosure of any Confidential Information to
only those  employees and agents of ABMC who have a need to know the information
and who have similarly agreed to keep such information confidential.

You further agree not to use any  Confidential  Information for your own benefit
of for the  benefit  of  anyone  other  than  ABMC.  You  acknowledge  that  all
Confidential Information is and remains the property of ABMC and that no license
or rights in the Confidential Information has been or is granted to you.

      "Confidential  Information" means and includes all information relating to
      marketing,  advertising,  public relations,  development,  services, trade
      secrets, trade "know-how," business plans, Customer (as defined below) and
      Customer Prospect (as defined below) lists,  distributor lists,  Customers
      and Customer Prospects  information,  distributor  information,  financial
      date, personnel date, employee compensation and benefits information,  new
      personnel  acquisition  plans,  details of  contracts,  pricing  policies,
      operational  methods,  marketing plans or strategies,  service development
      techniques or plans,  business  acquisition or investment  plans, or other
      confidential  and  proprietary  information  related  to the  business  or
      affairs of ABMC and its Customers or Customer Prospects.

      The term  "Customer"  means any person or entity for which ABMC  performed
      any Covered Services during the two (2) year period immediately  preceding
      the termination of your employment with ABMC for any reason whatsoever.

      "Customer  Prospect"  means any  person or entity to which ABMC made a new
      business  presentation or proposal  related to Covered Services during the
      two  (2)  year  period  immediately  preceding  the  termination  of  your
      employment with ABMC for any reason whatsoever.

      "Covered  Services"  means any  services or  products of whatever  kind or
      character offered or provided by ABMC to any Customer.

      ENFORCEMENT

You agree that it is  impossible  to measure  solely in money the damages  which
will accrue to ABMC by reason of your failure to perform any or your obligations
set forth in the restrictive covenant paragraphs above. Therefore, if ABMC shall
institute any action or proceeding to enforce the provisions of the  restrictive
covenants  paragraphs,  you hereby  waive the claim or defense  that there is an
adequate  remedy  at law and  agree  in any such  action  or  proceeding  not to
interpose  the claim or  defense  that such  remedy  exists at law.  You  hereby
specifically affirm the appropriateness of injunctive,  specific performance, or
other  equitable  relief in any such action,  in addition to all other  remedies
ABMC has at law.

<PAGE>

If any of  provision  of the  restrictive  covenants  shall be held  invalid  or
unenforceable, the remainder nevertheless shall remain in full force and effect.
If any  provision is held invalid or  unenforceable  with respect to  particular
circumstances, it nevertheless shall remain in full force and effect in al other
circumstances.

If, in connection with any action taken by ABMC to enforce the provisions of the
restrictive  covenants  of this  agreement,  a court  shall hold that all or any
portion  of the  restrictions  contained  therein  a re  unreasonable  under the
circumstances  then  existing  so as to  render  such  restrictions  invalid  or
unenforceable,  the parties agree that any court of competent  jurisdiction  may
reform  such  unreasonable  restrictions  to the extent  necessary  to make such
restrictions  reasonable under the  circumstances  then existing so as to render
such restrictions both valid and enforceable.

You agree to indemnify, save and hold harmless ABMC from and against any and all
claims,  damages,  losses, costs and expenses (including  reasonable  attorneys'
fees)  incurred  by ABMC  arising  out a any action to enforce  the terms of the
restrictive covenants of this agreement.

OTHER EMPLOYMENT INFORMATION

In making  this offer of  employment,  ABMC has  relied on your  representations
that: (a) you are not currently a party to any contract of employment that might
impede your  ability to accept this offer or to perform the  services  completed
thereby; and (b) that you are not subject to any non-competition  arrangement or
other  restrictive  covenants  that might  restrict  your  employment at ABMC as
contemplated by this offer.

EXCLUSIVE SERVICE

You will perform services exclusively for ABMC and you will not perform services
for any other  entities  during the term of this  agreement  without the written
agreement of the ABMC Board of Directors.

Sincerely

/s/ Gerald Moore  19/6/03
----------------------------
Chairman, CEO and President

Accepted this 19th day of June, 2003 by:

/s/ Stanley Cipkowski
----------------------------
Stanley Cipkowski

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