Meson Capital Partners SC 13D InfuSystem / Meson Capital Partners ownership change

Exhibit B

JOINT FILING AGREEMENT

The undersigned, being duly authorized thereunto, hereby execute this agreement as an exhibit to this Schedule 13D to evidence the agreement of the below-named parties, in accordance with the rules promulgated pursuant to the Securities Exchange Act of 1934, to file this Schedule jointly on behalf of each such party.

Dated: May 11, 2012

MESON CAPITAL PARTNERS LLC
By: /s/ Ryan J. Morris
Name: Ryan J. Morris
Title: Managing Partner
MESON CAPITAL PARTNERS LP
By	Meson Capital Partners, LLC, its General Partner
By:	/s/ Ryan J. Morris
Name: Ryan J. Morris
Title: Managing Member
RYAN J. MORRIS, INDIVIDUALLY
/s/ Ryan J. Morris
Ryan J. Morris