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Exhibit 10.3

TRADEMARK SECURITY AGREEMENT

THIS TRADEMARK SECURITY AGREEMENT (this “Agreement”) dated as of October 10,
2012, is by and between TURBOSONIC TECHNOLOGIES, INC., a Delaware corporation
(the “Debtor”), and MEGTEC SYSTEMS, INC., a Delaware corporation (the “Secured
Party”).

This Agreement is executed pursuant to the terms of (a) the Promissory Note of
even date herewith (as amended, restated, supplemented, or otherwise modified
from time to time, the “Note”) executed by the Debtor in favor of the Secured
Party, and (b) the Second Lien Security Agreement of even date herewith (as
amended, restated, supplemented, or otherwise modified from time to time, the
“Security Agreement”) executed by the Debtor in favor of the Secured Party.
Capitalized terms used herein but not defined herein shall have the meaning
assigned to them in the Note or the Security Agreement, as applicable.

NOW, THEREFORE, for good and valuable consideration, receipt and sufficiency of
which are hereby acknowledged, the Debtor hereby grants to the Secured Party a
security interest junior to the Senior Secured Debt in all of the Debtor’s
right, title, and interest in, to, and under the following, whether presently
existing or hereafter arising or acquired:

(i)              all trademarks and all of the goodwill of the business
connected with the use of, and symbolized by, each trademark of the Debtor
(excluding trademark applications for which the Debtor has not filed and had
accepted under applicable Law a “Statement of Use” or “Amendment to Allege
Use”), including, without limitation, each trademark listed on Schedule A;

(ii)             each trademark license, including, without limitation, each
trademark license listed on Schedule B;

(iii)            all claims by the Debtor against third parties for (a) past,
present, or future infringement or dilution of any trademark, including, without
limitation, any trademark listed on Schedule A or under any trademark licensed
under any trademark license including, without limitation, any trademark license
listed on Schedule B, (b) injury to the goodwill associated with any trademark
or (c) breach or enforcement of any trademark license; and

(iv)            all products and proceeds of the foregoing;

provided, however, that the security interests granted herein shall not extend
to any trademark license or any rights thereunder where the Debtor is a licensee
to the extent that the granting of a security interest therein would, under the
express terms of such license, be prohibited or restricted or result in a breach
of the terms of, constitute a default under, or result in a termination of any
such license or any related agreement.

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The rights and remedies of the Secured Party with respect to the security
interest granted herein are without prejudice to, and are in addition to, those
set forth in the Security Agreement, all terms and provisions of which are
incorporated herein by reference. In the event that any provisions of this
Agreement are deemed to conflict with the Security Agreement, the provisions of
the Security Agreement shall govern.

[Signatures follow]

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IN WITNESS WHEREOF, the undersigned have executed this Agreement as of the date
first above written.

  TURBOSONIC TECHNOLOGIES, INC.,   as the Debtor           By: \s\ Edward F.
Spink   Name: Edward F. Spink   Title: Chief Executive Officer

ACKNOWLEDGMENT

PROVINCE OF ONTARIO

COUNTY OF WATERLOO

I, Irwin A. Duncan, a Notary Public for said County and State, do hereby certify
that Edward F. Spink personally appeared before me this day and stated that he
is the CEO of TurboSonic Technologies, Inc. and acknowledged, on behalf of
TurboSonic Technologies, Inc. the due execution of the foregoing instrument.

Witness my hand and official seal, this 12th day of October, 2012.

  /s/ Irwin A. Duncan   Notary Public My commission expires: is for life   /s/
Irwin A. Duncan  

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Agreed and accepted as of the 10th day of October, 2012.

MEGTEC SYSTEMS, INC.,
as the Secured Party

By: \s\ Gregory R. Linn   Name: Gregory R. Linn   Title: Senior Vice President
and Chief Financial Officer  

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