It doesn't sound bad at all but more like marketing language, like a paragraph you'd see in a pamphlet.
This sentence does not sound natural:
"The company has obtained a number of national patent certificates, according to customer needs to complete the design, prototype and mass production."
Maybe just use this:
"The company has obtained a number of national patent certificates to develop the design, prototype and mass production requirements for the customer needs."
The problem with the original sentence is it uses the comma incorrectly (as it seems) to start a list, but then "according to the customer..." breaks the sentence's natural flow.