This excerpt taken from the OPTC 10-K filed Mar 25, 2005.
Product WarrantyIn the ordinary course of business, the Company warrants its products against defect in design, materials, and workmanship over various time periods. Beginning in July 2002 the
Company offers a lifetime warranty on its products. Prior to 2002 the warranty period was limited to four years. Warranty reserve and allowance for product returns is established based upon managements best estimates of amounts necessary to settle future and existing claims on products sold as of the balance sheet date.
The following is a summary of the Companys continuing warranty obligation for the years ended December 31: