This folder contains correspondence and other documents relating to foreign and domestic patent applications, patent litigation, and other patent matters. Among the items for 1909 are letters concerning patent legislation in the United States and Great Britain, patent jurisdiction in the Panama Canal Zone, and the possible commercial exploitation of two Edison patents. Most of the letters are to or from Frank L. Dyer, president and general counsel of the National Phonograph Co.

Approximately 40 percent of the documents have been selected. The items not selected include routine letters of inquiry; receipts; Edison patents enclosed with selected correspondence; routine letters concerning taxes; accounts with attorneys; and items that duplicate information in selected material.

Related documents can be found in D-09-32 (Legal Department).