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Bizfon2000 and Bizfon4000 are registered trademarks of Bizfon, Inc. Micro- soft, Windows, and the Windows logo are registered trademarks of Microsoft Corporation. All other trademarks and brand names are the property of their respective proprietors. Limited Warranty Bizfon Inc. (‘Bizfon) warrants to the original end-user purchaser every Bizfon to be free from physical defects in material and workmanship under normal use for a period of one (1) year from the date of purchase (proof of purchase re