Emma T. L. Clark - Process of hardening and preserving plaster-of-paris casts and molds and making them impervious to water, &c.

Inventor

Emma T. L. Clark

Nº

371550

Invention

Process of hardening and preserving plaster-of-paris casts and molds and making them impervious to water, &c.

Date

October 17, 1887

Address

London, County of Middlesex, England

Assignor

Assignor Address

Illustration

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