Davis, Tuttle Venture Partners, L. P.

Tulsa Address:

110 West 7th Street Suite 1000

Tulsa, Oklahoma 74103-3703

Phone: 918/584-7272

Fax: 918/582-3404

Houston Address:

8 Greenway Plaza, Suite 1320

Houston, Texas 77046

Phone: 713/993-0440

Fax: 713/621-2297