What does PAT 190 on silver spoon with R W?

The markings "PAT 190" on a silver spoon likely indicate that the spoon is a patented design from the year 190, possibly referring to a specific patent granted for that design. The initials "R W" could represent the manufacturer or designer associated with the spoon, although more context is needed to identify them definitively. Collectors often use these markings to determine the age and authenticity of silverware. Always consult a silver expert or reference guide for precise identification.