Letters of George B. Prescott to the commissioner of patents, in reference to the inventions conveyed by the assignment of Thomas A. Edison for duplex and quadruplex telegraphy
Contributors: United States. Patent Office
Publisher: [s.n.]
Published: 1875
Place of publication: [s.l.]
Language: eng
Number of pages: 12
Subjects: Telegraph; Duplex system; Patents; Quadruplex system; Patent suits
Notes: Cover title.