Obviousness

The "Prior Art section" of this patent analysis, which is crucial for conducting an obviousness analysis under 35 U.S.C. § 103, has not been provided. Therefore, I cannot identify combinations of prior art references or explain the motivation for combining them to render the claims of US patent RE45971 obvious.

Furthermore, direct fetching of the patent RE45971 specification and claims also initially failed. While general information about searching for patents on the USPTO website was retrieved, the full text of RE45971 was not immediately available in the search results. Without the specific claim language of RE45971, a thorough obviousness analysis cannot be performed.

To proceed with an obviousness analysis, the following are required:

1. The complete text of US patent RE45971, including its claims and specification.
2. A list of relevant prior art references, detailing their teachings and disclosures.

Once these pieces of information are provided, I can analyze the differences between the claimed invention of RE45971 and the prior art, and determine if a person having ordinary skill in the art would have been motivated to combine elements from the prior art to arrive at the claimed invention, considering factors such as market demands, design incentives, or other known problem-solving techniques.