from SC 13D/A
1 page
<page> 1 Exhibit 1 This Exhibit 1 to Amendment No. 3 to Schedule 13d Is Filed Pursuant to the Requirements of Rule 13d(1)(f)(1)(iii). the Undersigned Hereby Agree That Amendment No. 3 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 Keithley Management 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
