This company is known only from patent records. It is not known whether this company ever produced machines. The patents explicitly assigned to this maker are all from 1884 and 1885. The inventors were James A. Roberts and William M. Dwight.
Information Sources
- Dwight received planer patents from late 1885 through 1887, and these were not assigned to any company. It seems likely that Roberts Duplex Planing Machine Tool Co. was no longer in business by late 1885.