Anonymous

Hercules Incorporated (American, 20th Century)

Dow Chemical Company (American, 19th/20th Century)

Fred L. Parker (American, 1886-1956)

Hercules Incorporated (American, 20th Century)

Hercules Incorporated (American, 20th Century)

Dow Chemical Company (American, 19th/20th Century)

Hercules Incorporated (American, 20th Century)

Henriëtte Willebeek le Mair (Dutch, 1889 – 1966)

Hercules Incorporated (American, 20th Century)

Dow Chemical Company (American, 19th/20th Century)

Anonymous

Hercules Incorporated (American, 20th Century)

International Business Machines Corporation (American, 20th Century)

Hercules Incorporated (American, 20th Century)