1930s Duro Metal Products Patent Litigation Archive Oklahoma AB - 041322 - 104475

AB - 041322 - 104475

comprising curved exterior skin riveted to a series of internal formed ribs

It features five drawers

This glass mat is in turn fused with the hot outer white layer

1930s Duro Metal Products Patent Litigation Archive Oklahoma AB - 041322 - 104475c. 1920s 1950s; Duro Metal Products Company Chicago, IL Extensive archive of patent related materials centered around mechanical locking and tool adjacent innovations, including diagrams, typed legal correspondence, engineering drawings, and original patent documentation. The group appears to document Duro Metal Products' involvement in a dispute and or licensing negotiations surrounding inventions attributed to Johnson Lock Co., with particular