Gray nevertheless left his mark on the telephone industry in 1869 when he and Enos N. Barton formed Gray and Barton , a small manufacturing firm in Cleveland , Ohio .
Alexander Graham Bell put in a patent application just hours before Gray filed one .
Gray left Gray 's mark on the telephone industry in 1869 when he and Enos N. Barton Gray Gray and Barton , a small manufacturing firm in Cleveland , Ohio .
Alexander Graham Bell put in a patent application just hours before Gray filed one .