Title: Apparatus for transmission of messages by electricity
Patent number: 315,368
Date granted: 4/07/1885
Notes: Assigned to American Bell Telephone Co.
View this patent at the USPTO.
Title: Apparatus for transmission of messages by electricity
Patent number: 315,368
Date granted: 4/07/1885
Notes: Assigned to American Bell Telephone Co.
View this patent at the USPTO.