Suppose a company, "XYZ, Inc", provides services they call "American history tours", which is exactly that: tours about American history.
Now there's a company named "American History Tours, Inc". Can this company claim all usages of the phrase "American history tour" and "American history tours" as a description of services provided by "XYZ, Inc" are infringing? If so, with what limitations and what amount of variation is necessary to avoid infringement, ex is "American historical tours" or "tours of American history" sufficiently different? Does capitalization matter? For example as a headline the phrase would appear as "American History Tours" but otherwise would appear as simply "American history tour". What about a partial match, like "American history" or "history tour"?
Now there's a company named "American History Tours, Inc". Can this company claim all usages of the phrase "American history tour" and "American history tours" as a description of services provided by "XYZ, Inc" are infringing? If so, with what limitations and what amount of variation is necessary to avoid infringement, ex is "American historical tours" or "tours of American history" sufficiently different? Does capitalization matter? For example as a headline the phrase would appear as "American History Tours" but otherwise would appear as simply "American history tour". What about a partial match, like "American history" or "history tour"?