Cassius M. Heffron (1845-1928) of Rochester, New York was granted Letters Patent for his apple slicer on June 10, 1890. Heffron's apple slicer was advertised as the The Sun Apple Slicer or just the Sun Slicer and came with either steel or bronze blades.
Heffron, C. M., inventor; Apple Slicer. 1890 June 10. US429624.
The Sun Slicer. The Iron Age. 1891 June 4, p. 1099.
Thornton, D. 1997. Apple Parers. Sunnyvale, California: Off Beat Books.