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US Patent: 552,873
Testing Machine
Patentees:
William Sellers - Philadelphia, PA
John Sellers Bancroft - Philadelphia, PA
Carl G. Barth - Philadelphia, PA

USPTO Classifications:
73/796, 73/860

Tool Categories:
specialty machines : testing machines

Assignees:
William Sellers & Co., Inc. - Philadelphia, PA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 25, 1893
Granted: Jan. 07, 1896

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for William Sellers & Co.

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