all
- Prussian transport company, 19th century
- American architectural firm, active 1960s
- Italian stonemasons, active in the United States late 19th century
- American architectural firm, contemporary
- Berlin-based slide manufacturer
- German photographer and slidemaker who worked for the Staatliche Museen in Berlin
- German photographic printing company, active 1894-1921
- Architectural duo, active in the New Mexico Territory, late 19th century
- German lantern slide and photograph vendor, ca. 1890s-1950s