The speaking telephone interferences :
decisions of the Examiners-in-Chief : cases A, B, C, D, E, F, G, H, I, J, and no. 1.

Description

Corporate Author

United States. Patent Office.

Language(s)

English

Published

[Washington : United States Patent Office?, 1884]

Subjects

Telephone > Telephone / United States.

Note

"October 23, 1884"--P. 47.
At head of title: In the United States Patent office.

Physical Description

47 p. ; 25 cm.

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