This section is from the book "The Constitutional Law Of The United States", by Westel Woodbury Willoughby. Also available from Amazon: Constitutional Law.
In Montague v. Lowry42 was held illegal as a restraint of interstate commerce an association of dealers in the State of California and manufacturers in other States, with the purpose of controlling the sale of their product in California. Here there was no allotment of territory as in the Addyston case, and, except as to the provision of the agreement that the non-resident manufacturers should sell their product only to the members of the association in California, no interstate transactions were regulated. This provision, however, it was held, rendered the entire combination in violation of the act of 1890. " It was not a combination or monopoly among manufacturers simply but one between them and dealers in the manufactured article of commerce between the States."
 
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