Mark Horowitz is searching for his grandfather's naturalization. No first name was provided. Apparently from the writing, he lived in Ohio.
After 1927, naturalizations had to be issued in Federal Court. The index cards for the District Court of Northern Ohio are online at FamilySearch.
They are not indexed, with a little effort the Horowitz naturalizations begin at image 2641 of
Secaucus NJ USA
HASSMAN, SONENTHAL, DAUERMAN, LUCHS - Drohobycz, Ukraine
HIRSCHHORN, GOLDSTEIN, BUCHWALD - Dolyna, Ukraine
ELLMAN, COIRA, MAIDMAN - Minkovtsy, Ukraine
KAGLE, FASS - Ulanow, Poland