In the legal environment of different countries, multiple patent or trademark registrations for the same product can be carried out in the following ways to increase the difficulty of competitors in legal proceedings: 1. **International application**: Submitting international applications through the Paris Convention or the Patent Cooperation Treaty (PCT) allows you to apply for patents in multiple countries at the same time, increasing the scope of protection in each country. 2. **Regional registration**: In some regions, such as Europe, you can apply for a European Community patent or trademark (such as EUIPO) to cover multiple countries at once, simplifying the registration process. 3. **Apply for different types of protection**: In addition to applying for patents or trademarks, you can also consider applying for different types of intellectual property protection such as design and copyright to enhance overall legal protection. 4. **Using different trademark versions**: Registering different trademarks or brand names for the same product in different countries can increase the degree of confusion for competitors and increase their legal litigation difficulties. 5. **Regional or local brand registration**: Registering trademarks in specific regions or places increases protection for local markets and may create legal complications. 6. **Maintain multiple patents**: Apply for patents for different innovative points of the same product separately to form a patent portfolio, so that competitors face a more complex legal environment when challenging. 7. **Monitor and collect information**: Monitor and collect information on competitors' patent and trademark registrations, and adjust your own registration strategy in a timely manner to avoid potential infringement risks. 8. **Use legal procedures**: In some countries, legal procedures can be used to delay or hinder competitors' products from entering the market, such as applying for temporary injunctions or through counterclaims. 9. **Combination of transparent and non-transparent strategies**: In some cases, core competitive advantages can be protected by publicly applying for some patents or trademarks while keeping other key technologies secret. These means can enhance the competitiveness of enterprises in the international market, but they also need to comply with the laws and regulations of various countries and operate with caution to avoid potential legal risks and negative consequences.