Patents, Trademarks and Trade Secrets. We own hundreds of living patent families including patents and applications registered or filed in Israel, the United States, the European Patent Office and other countries. We also hold dozens of living trademark families relating to specific products. A significant part of our intellectual property assets relates to unique applications of advanced software-based technologies, development processes and production technologies. These applications are often not easily patentable, but are considered as our trade secrets and proprietary information. We take a number of measures to safeguard our intellectual property against infringement as well as to avoid infringement of other partiesí intellectual property.
Governmental Customersí Rights in Data. The IMOD usually retains specific rights to technologies and inventions resulting from our performance under Israeli government contracts. This generally includes the right to disclose the information to third parties, including other defense contractors that may be our competitors. Consistent with common practice in the defense industry, approximately 35% of our revenues in 2008 was dependent on products incorporating technology that a government customer may disclose to third parties. When the Israeli government funds research and development, it usually acquires rights to data and title to inventions. We often may retain a non-exclusive license for such inventions. The Israeli government usually is entitled to receive royalties on export sales in relation to sales resulting from government financed development. However, if only the end product is purchased, we normally retain the principal rights to the technology. Sales of our products to the U.S. government and some other customers are subject to similar conditions. Subject to applicable law, regulations and contract requirements, we attempt to maintain our intellectual property rights and provide customers with the right to use the technology only for the specific project under contract.
Licensing. There are relatively few cases where we manufacture under license. In such cases, the licensor typically is entitled to royalties or other types of compensation. In some cases where we have acquired business lines we obtain a royalty free license to use the applicable technology for specified applications. Occasionally, we license parts of our intellectual property to customers as part of the requirements of a particular contract. We also sometimes license technology to other companies for specific purposes or markets.