Various companies with the Mindil name are listed in documentation as early as 1853 in Philadelphia.

The earliest mentions are found in Philadelphia classified advertisements starting in 1853, listed as Mindil & Boning. By December 1853, these listings change to Mindil & Brother, suggesting a partnership between two of the Mindil brothers.

In advertisements that began appearing in local newspapers in 1866, the company is still listed as Mindil & Brother, located at No. 25 N. Third Street. No case manufacturing is indicated in any of these advertisements while importing and wholesale services are promoted.

George W. Mindil was admitted as a partner in January 1868. [The Philadelphia Inquirer, 31 Jan 1868, Page 6] At this time, the company name was changed to Mindil, Brother & Co.

On February 1, 1873, the firm was officially dissolved by Theodore Mindil, Gustav Mindil, and George W. Mindil. At this time, Theodore was removed from the company and a new firm was organizaed by Gustav and George W. under the name "G. Mindil & Son." [The Philadelphia Inquirer, 21 Feb 1873, Fri · Page 5]

Theodore's estate was being settled in 1876, indicating that he passed away shortly after the company restructing. [The Philadelphia Times, 09 Jun 1876, Page 4]

According to advertisements, the company was known as "Mindil, Brother & Co." from 1868 to 1873.