page_title: Anderson's-Black Rock, Inc. v. Pavement Salvage Co.
section_title: Background
hierarchical_section_title: Anderson's-Black Rock, Inc. v. Pavement Salvage Co. / Background
caption_attribution_description: English: PraeceptorIP (talk) 21:59, 18 February 2009 (UTC); drawing from patent involved in Anderson’s-Black Rock As a US patent drawing, this jpeg is not protected under US copyright law.
context_page_description: Anderson's-Black Rock, Inc. v. Pavement Salvage Co., 396 U.S. 57, is a 1969 decision of the United States Supreme Court on the legal standard governing the obviousness of claimed inventions. It stands for the proposition that, when old elements are combined in a way such that they do not interact in a novel, unobvious way, then the resulting combination is obvious and therefore unpatentable.
context_section_description: The patent sought to solve a problem in paving asphalt roads—the joint between the new section and old, cold sections tends to bond poorly. Previously, one machine spread and shaped the new deposit of asphalt and a second machine contained a radiant-heat burner, which softened cold asphalt. The claimed invention combined on one machine chassis the spreading and shaping equipment along with a radiant-heat burner.
  The defendant highway constructor's alleged infringement resulted from its placing of a radiant-heat burner on the front of a standard paving machine. This allowed "its machine to perform the same functions with the same basic elements as those described in [the] patent."
caption: Drawing of the machine patented in this case[1]
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