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US Patent: 567,966
Substance for telephone-electrodes
Patentee:
Daniel Drawbaugh - Eberly's Mill, PA

USPTO Classifications:
252/514, 427/226, 427/554, 428/403, 428/570, 428/670

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
E. H. Parry
R. G. Dyrenforth

Patent Dates:
Applied: Jan. 10, 1896
Granted: Sep. 22, 1896

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Daniel Drawbaugh

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