Is there a patent for ordinary screws and the like?

Fastener products such as screws are of course patented. I remember reading such a book before, which introduced a case of patent litigation in the United States. That is, an American inventor applied to the Patent Office for an improved invention of wooden screw tapping machine in 1922 65438+ 10/3. His application conflicts with the patent of another American inventor Smith. In addition, in the column of patent inquiry website and invention name, three key words of "screw" were entered, resulting in 15 invention patents, 102 utility model patents and 12 design patents. Therefore, the conditions for granting patent right are novelty, creativity and practicality. The patent law does not expressly stipulate that screws cannot be patented. As long as you have made improvements in the research of screws beyond the predecessors, such as saving materials, reducing costs and improving the manufacturing methods of screws, you can also obtain a patent right.