Connector manufacturers generally have their own brands. This is not necessarily the case with patents, because there are too many connector models, ranging from hundreds of thousands to millions.
Nowadays, domestic connector standards are imitated according to the standards of well-known foreign brands. The standards of products in the electronic components industry are basically perfected by foreign brands, and then other brands imitate them according to the finished products.
However, foreign brands cannot prevent some small brands from imitating their products because there are too many connector models, and since the connectors have been put into the market, they are all universal and there is no such thing as a patent. For example, if a connector produced by one brand can be used on a certain machine, another brand can naturally produce replacement parts. Just like Android data cables, basically every small brand can produce its connectors.
As for how to identify the quality of connector manufacturers, as long as you look for connectors from some big companies, or brands whose company information can be found online, the product quality has passed quality inspection, do not look for some online companies Just the brand for which no information can be found.