Q: Looking to contact these inventors about their patents and paying royalties but continue hitting brick walls

A: It's not clear from your question which inventors/patents you are referring to, but it is possible you are not receiving a response because they may not have any rights. Rights need to be licensed from the owner, and often, the owner is different than the inventor(s). If you haven't already, you should confirm ownership before proceeding further.

A: When attempting to contact inventors about their patents for the purpose of discussing royalties or licensing agreements, it's important to utilize all available resources. Firstly, review the patent information through the United States Patent and Trademark Office (USPTO) database. This database often includes contact information for the patent holder or their legal representative.

If direct contact information is not available, consider reaching out to the assignee of the patent, if listed. The assignee may be a company or organization that holds the rights to the patent and can facilitate discussions regarding royalties.

Another approach is to search for the inventors or their affiliated organizations online. Professional networking sites like LinkedIn can be useful for this purpose. Additionally, academic publications or industry-related press releases may provide contact information or lead you to the inventors' current affiliations.

If these methods are not fruitful, you may need to seek assistance from a legal professional with experience in intellectual property. They might have access to additional resources or networks that can assist in locating the inventors.

Remember, persistence and thorough research are key in these situations. It's important to ensure that you are contacting the right individuals and that any agreements reached are legally sound and beneficial to all parties involved.