Correspondence between John Charnley and members of staff at Chas F. Thackray Limited, relating to discussion of Charnley’s design and testing of new components of prostheses, instruments and materials. There is reference to sockets, cups, cutting templates, to cement, and calculations in relation to wear and durability.
Also included is reference to Charnley’s assistance in the production of the cautionary statement provided with implant packages, product catalogues and instructional pamphlets with specifications for use.
There are a series of complaints by Charnley relating to the nomenclature of the prostheses and production at Thackray, and regarding quality control and inaccuracies in orders.
There is discussion of patents, patent infringement in North America, and the sale of Charnley prostheses in Australia. There is also reference to the relationship between Charnley and [James] Howorth [and Co. Limited], and between Charnley and Codman [and Shurtleff Inc.]
Also included is correspondence relating to the payment of invoices and royalties, a leaflet on the of Ortron 90 in relation to other materials, produced by Thackray, and a catalogue for the Charnley Total Hip Prostheses, Cintor Orthopaedic division.