This Exhibit 1 to Amendment No. 8 to Schedule 13D is filed pursuant to the requirements of Rule 13d-1(k)(1)(iii). The undersigned hereby agree that Amendment No. 8 to Schedule 13D, to which this Exhibit 1 is attached, is filed on behalf of each of the undersigned.
KEITHLEY INVESTMENT CO. LIMITED PARTNERSHIP, an Ohio limited partnership
By:
/s/ Joseph P. Keithley
Joseph P. Keithley, its sole general partner
/s/ Joseph P. Keithley
Joseph P. Keithley
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