Columbia subject headings:
Calotype--Patents.
Laroche, Martin, approximately 1815-1886.
Law and art--England.
Talbot, William Henry Fox, 1800-1877.
Harvard subject headings:
Calotype--Patents.
Laroche, Martin, approximately 1815-1886.
Talbot, William Henry Fox, 1800-1877.
Princeton subject headings:
Calotype--Patents.
Laroche, Martin, approximately 1815-1886.
Patents.
Talbot, William Henry Fox, 1800-1877.