The following table summarizes our principal competitors by operating segment. Our proprietary driveline and power technologies product lines have strong identities in the markets we serve.  Throughout  these product lines, we manufacture and sell our products under a number of patents that have been obtained over a period of  years and expire at various times. We consider each of these patents to be of value and aggressively protect our rights  throughout the world against infringement.  We are involved with many product lines and the loss or expiration of any particular  patent would not materially af fect our sales and profits. We own or have licensed numerous trademarks that are registered in many countries, enabling us to market our products  worldwide. For example, our Spicer®, Victor Reinz® and Long® trademarks are widely recognized in their market segments. Since our introduction of the automotive universal joint in 1904, we have been focused on technological innovation. Our  objective is to be an essential partner to our customers and we remain highly focused on of fering superior product quality ,  technologically advanced products, world-class service and competitive prices.  To enhance quality and reduce costs, we use  statistical process control, cellular manufacturing, flexible regional production and assembly , global sourcing and extensive  employee training. We engage in ongoing engineering and research and development activities to improve the reliability , performance and  cost-effectiveness of our existing products and to design and develop innovative products that meet customer requirements for  4 Engineering and Research and Development Intellectual Property Segment Principal Competitors Light Vehicle ZF Friedrichshafen AG GKN plc American Axle & Manufacturing Holdings, Inc. Magna International Inc. Wanxiang Group Corporation Hitachi Automotive Systems, Ltd. IFA ROTORION Holding GmbH Neapco, LLC Vertically integrated OEM operations Commercial Vehicle Meritor, Inc. American Axle & Manufacturing Holdings, Inc. Hendrickson (a subsidiary of the Boler Company) Klein Products Inc. Vertically integrated OEM operations Off-Highway Carraro Group ZF Friedrichshafen AG GKN plc Kessler + Co. Meritor, Inc. YTO Group Comer Industries Vertically integrated OEM operations Power Technologies ElringKlinger AG Federal-Mogul Corporation Freudenberg NOK Group MAHLE GmbH Modine Manufacturing Company Valeo Group YinLun Co., LTD Denso Corporation