--Oshkosh Corp. announced that it has commenced a 13 million share common stock offering, and will use the proceeds to repay term loan borrowings. --We are placing our ratings on the Oshkosh, Wis.-based specialty vehicle manufacturer on CreditWatch with positive implications. --We intend to resolve the CreditWatch listing after the company completes the common stock offering, through a review of the capital structure and operating prospects for the company. NEW YORK (Standard&Poor's) Aug. 6, 2009--Standard&Poor's Ratings Services today placed its ratings, including the 'B' corporate credit rating, on Oshkosh Corp. on CreditWatch with positive implications. The CreditWatch placement follows the company's announcement that it has commenced a 13 million share common stock offering, and plans to