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This material consists of correspondence, court records, and other items relating to patent interference proceedings and infringement suits and to other legal actions involving the technical development and commercial exploitation of Edison's cement machinery. Included are documents pertaining to Edison's crushing rolls, which were used in both iron ore processing and cement manufacture, and to his invention of a long rotary kiln for making cement.
Less than 10 percent of the documents have been selected. The selected items reflect Edison's personal involvement in legal matters, detail experimental work by Edison or his assistants, or broadly pertain to matters of corporate organization and patent management. Related material can be found in the records of the Edison Portland Cement Co. and the Edison Ore Milling Syndicate, Ltd. (Company Records Series). The documents are arranged in the following order: