Jacob Hasslacher Images

Portrait of Jacob Hasslacher.

Portrait of Jacob Hasslacher’s business partner, Franz Roessler.

Portrait of German-American scientist-entrepreneur Gustavus Michaelis, who accused Roessler & Hasslacher of having violated his intellectual property rights when it…

Portrait of Dr. Hector Carveth, who taught chemistry at Cornell University before joining Roessler & Hasslacher in 1905.

Alexander Schneider of Degussa and Jacob Hasslacher at Niagara Falls in 1892.

Package of Persil detergent, 1907.

Ira Remsen, professor of chemistry at Johns Hopkins University, was one the star witnesses who testified on behalf Hasslacher in…