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US Patent: 140,735
Improvement in plastic compositions for the manufacture of knobs and other molded articles
Patentee:
Henry E. Shepard (exact or similar names) - New Haven, CT

USPTO Classifications:
106/241, 16/417, 16/433, 16/441

Tool Categories:

Assignees:
Bradley & Hubbard Mfg. Co. - Meriden, CT

Manufacturer:
Bradley & Hubbard Mfg. Co. - Meriden, CT

Witnesses:
A. Chamberlain, Jr.
E. A. Wilson

Patent Dates:
Applied: Feb. 21, 1873
Granted: Jul. 08, 1873

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Description:
The composition of this "plastic" case material is gum shellac and mica.

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