Patent Model of a Type Mold

Description (Brief)
This patent model demonstrates an invention for a type mold which was granted patent number 450083. The patent details a mold for casting type with letters on both ends, or "duplex-lettered type." Such type was used in printing for the blind, though no particular application is specified for this patent.
Currently not on view
Object Name
manufacture, type mold
date made
ca 1891
patent date
Mitchell, Thomas
Milne, John
Physical Description
metal (overall material)
paper (overall material)
overall: 5 cm x 13 cm x 14.8 cm; 1 15/16 in x 5 1/8 in x 5 13/16 in
ID Number
patent number
accession number
catalog number
Industry & Manufacturing
Patent Models, Graphic Arts
Patent Models
See more items in
Culture and the Arts: Graphic Arts
Patent Models
Patent Models, Graphic Arts
Data Source
National Museum of American History, Kenneth E. Behring Center

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