It might be helpful 😇
Inv. I. (in Latin: invenit): inventor of the motif
Del, delvt, del, de, d (in Latin delineavit): the draughtsman
Sculp. (in Latin sculpsit): the engraver. We also find inc (incidit), sculpsit, caelavit, fecit, fec, lith (this also works for prints).
Exc. ( in Latin excudit): publisher. He owns the plate and is free to reproduce it.
Dir. (in Latin Direxit): the director of the workshop.