What is a free patent? The free patent we are talking about is actually a kind of patent patent document. The purpose of patent document is to provide patent technology reference for patentees and pave the way for the innovation of patent technology. Is there any free patent technology in the patent? The answer is yes, so what are free patents and where are they generally obtained? The so-called free patent generally refers to patent documents. The patentee will ask what is a patent document? Patent documents are patented technologies that have expired. For example, patentees will refer to some patented technologies when applying for patents. Generally speaking, these patented technologies are free patent documents. What free patents specifically include? Free patented technologies mainly allow patent holders to understand the patented technologies of their predecessors. Patent holders develop better patented technologies by standing on the shoulders of giants. Free technology patents have long been that the technology is oriented to all In society, everyone can use the patented technology; of course, these patents can only allow the patentee to understand the technology; of course, the patentee cannot repeatedly apply for patented technical documents. Many free patented technologies have an important impact on patentees. Furthermore, in the process of patent technology application, there are still some people who give up the patented technology during the application process. These technologies are sometimes new patented technologies, which are very useful. Reference value; these free patented technologies can be learned through patent search websites, such as some large patent literature websites, soopat, and the State Intellectual Property Office; patents only need to make corresponding transformations of existing patented technologies, or have New technological innovations can be applied for as their own patents, and of course they need to comply with the three characteristics of patents; if the patentee really cannot develop the patented technology, but there is a huge demand for the corresponding patented technology field, then the patentee still has another channel to obtain it. The patent method is to obtain patents through patent licensing or directly through patent technology transactions.