When was the trumpets valves invented?

Question

ive tried looking on Google and wikipedia but i cant find nuthign

any help would be appreciated

Answer 1

An excerpt from a good essay on the history of the trumpet:

The first piston valve instruments were developed just after the start of the 19th century. The earliest type was the Stölzel valve, invented by Heinrich Stoelzel in 1814. Rotary valves were developed by 1818, by Friedrich Blühmel in partnership with Heinrich Stölzel. In 1827 the Berlin piston valve was invented, and in 1838 François Périnet invented the piston valve that most brass instruments use today.

Other research on the history of the trumpet more or less confirms the above. I will list it as a source for comparison.

Answer 2

Trumpets do not have valves.