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.
SUN PAT. JUNE 10 1890
C. M. HEFFRON
An advertisement for The Sun Slicer appeared in the June 4, 1891 issue of The Iron Age (Iron Age, 1891, p. 1099).
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.