Manufacturer Holtz & Mueller was founded in 1874 as a partnership between Fredrick Holtz and George A. Mueller. In 1876 the business name changed their name to the Cincinnati Screw & Tap Co. In 1878 they began manufacturing milling machines, and on 19 March 1884 the business was reorganized as a corporation. In 1889 the milling machine business was spun off and incorporated as the Cincinnati Milling Machine Co.; see that entry for the continuing history. The original Screw & Tap firm remained in business until 1915.
Information Sources
- American Milling Machine Builders: 1820-1920 by Kenneth L. Cope, 2007
- 1884 Cincinnati Milacron 1984, Finding Better Ways, © 1984 by the Cincinnati Milacron Co., Inc.