If I may, in 1924 French magazines, the one off avionnette designed by Pierre Carmier, an engineer, appears to be referred to as the Carmier avionnette, with no letter or number.
Building up from the Wikipedia page, a few people helped him with the design and / or testing of that aircraft, an engineer by the name of Dupuy and a Great War pilot, Jean Chalambel. Mind you, Carmier's brother, Paul, was also involved at some point.
From the looks of it, the Carmier T.10 was a different design, seemingly completed in early 1946. A photo and description, in French, can be found at in the April 27th, 1946 issue of the French magazine Les Ailes. The registration of that aircraft was F-WBBG.