In July 1899 a machine using a Labitte engine mounted behind the rear wheel won the world's first race for two-wheeled motor bicycles, "Le Criterium des Motocyclettes", a course of 100km between Étampes and Chartres. The Pernoo was piloted by one of the Labitte brothers.
The term motocyclettes had been trademarked by the Werner Brothers (who possibly used a Labitte engine in their first machine) but was later ruled by the courts to be in the public domain.
Pernoo also built motor tricycles. He had considerable experience in the field, having worked with a Rudge and Whitworth cycle dealership in Paris. (As Bourdache points out, that concession was previously held by Duncan and Suberbie who built the Hildebrand & Wolfmüller under licence.)
One of these motorcycles was part of the Musee de Sury-le-Comtal Collection Lefranc.