Which of the following is considered a non-patentable invention?

A scientific principle is considered a non-patentable invention because it is generally classified as a fundamental law of nature or abstract idea. The U.S. patent system does not allow for the patenting of natural phenomena, mathematical formulas, or scientific theories because these concepts are seen as discoveries rather than inventions. For an invention to be patentable, it must involve the application of an idea in a tangible manner or provide a practical solution to a problem, rather than simply stating a natural principle or abstract thought.

In contrast, a newly created genetic engineering technique, a product with a novel design, and a computer algorithm could potentially meet patentability requirements under the right conditions, as they can represent specific applications or processes that provide tangible benefits or solutions. These inventions can involve technical details or involve innovative applications that move beyond mere concepts.