Cornell University Law School DOLBEAR et al. v. AMERICAN BELL TEL. Co.1 MOLECULAR TEL. CO. et al. v. SAME.2 AMERICAN BELL TEL. Co. et al. v. MOLECULAR TEL. Co. et al.3 CLAY COMMERCIAL TEL. CO. et al. v. AMERICAN BELL TEL. Co. et al. PEOPLE'S TEL. Co. et al. v. SAME.4 OVERLAND TEL. CO. et al. v. SAME.
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Patent US350299A: Mode of electric communication. Angemeldet am 24. März 1882, veröffentlicht am 5. Oktober 1886, Anmelder: Dolbear Electric Telephone Company, Erfinder: Amos Emerson Dolbear.
