Sargent and Greenleaf
Sargent and Greenleaf is a lock manufacturer. It is not to be confused with Assa Abloy's Sargent brand. Sargent and Greenleaf is well-known[source?] for their safe locks, although they also make other lock products including military-grade padlocks.
This short article about the United States can be made longer. You can help Wikipedia by adding to it.