The Combier distillery claims that Triple sec was invented some time between 1834 and 1848 by Jean-Baptiste Combier in Saumur, France. However, Combier was more famous for its élixir Combier, which contained orange but also many other flavorings.
^The Combier web site says that Combier's confectionery store opened in 1834, but says only that Triple Sec was invented "à cette époque" as a filling for his candies and chocolates; it also does not mention when Combier's Triple Sec was actually commercialized.
^"Les liquoristes saumurois" in Saumur jadis, anonymous Web publication at  cites Richard Gasnier, Les liquoristes saumurois de 1830 à 1910, mém. de maîtrise, Angers, 2000, B. U. de l'U.C.O., 15 747 ; François Bouyssi et Isabelle Emeriau, "James Combier ( 1842-1917 ). Essai biographique...", S.L.S.A.S.,, 1992, p. 46-89 ; Alain Mariez, "Un zeste d'orange, deux doigts d'ambition", L'Anjou, décembre 1995, p. 70-77 ; Christelle Couvreux, Marie Bardisa, La Distillerie Combier. Saumur, Itinéraires du Patrimoine, 1999.