One of the articles above mentions that the "S.S. White company, manufacturers of a brace found in one skull, is contacting its 4000 clients throughout the world in an effort to obtain an identification of the victims."
Because this is a historical case, I decided to Google "S.S. White company" to see what there was about it.
Started in Philadelphia, eventually merged w/ another dental supply company with production in NYC (Staten Island). It established branch offices in major U.S. cities & abroad.
The Smithsonian states that the company records are stored at Hagley Museum in Delaware. Apparently these records are extensive.
History
"Its corporate roots are found in the history of Samuel Stockton White, who began his career as an apprenticing dentist and ventured into his own business in 1844, manufacturing porcelain teeth in Philadelphia, Pennsylvania."
Smithsonian:
S. S. White Dental Manufacturing Company Records, 1791-1970 (bulk 1870-1965).
"
By the mid nineteenth century the S.S. White Company had become the largest manufacturer of dental instruments in the world. Branch offices for the sale of the firm's products were opened in New York (1846), Boston (1850), Brooklyn (1852), Chicago (1858), Atlanta (1891), Rochester (1897), New Orleans, Cincinnati, San Francisco, Los Angeles, Nashville, Minneapolis, St. Paul, Peoria, and Omaha. Branches were established abroad in Berlin (1897), St. Petersburg (1899), Toronto, London, Paris, Japan, and Australia. In 1881 the firm was incorporated, changing its name from the S.S. White Co. to the S.S. White Dental Manufacturing Co. The extensive plant of Johnston Bros., on Staten Island, New York, was acquired; it produced a large portion of the products marketed by the firm... It published the pioneering periodical, THE DENTAL COSMOS, from 1859 to 1936."
...
"The records of the S.S. White Dental Manufacturing Company are relatively complete. The greater part of the collection is concerned with patents..."
"Accounts include general ledgers, ledgers from foreign branch offices, records of patent royalties, balance sheets, sales records, and sales statistics. There are six boxes of employee records and personnel cards, ca. 1910-1955... Also included is correspondence relating to marketing and sales..."