The Czech clarinettist Franz Thaddeus Blatt (1793-1856) wrote 15 etudes for oboe and 20 exercises for saxophone or english horn, but I think it’s fun (and challenging) to practice them on trumpet also.
Blatt-15-Entertaining-EtudesBlatt-20-Exercises
The following exercises are taken from Blatt’s Clarinet Method. Because they are written for clarinet the exercises demand a bigger range than we are used to from trumpet exercises.
Blatt-Clarinet-exercises