L'Atelier d'Art Photographique, Paris

According to an article in French Wikipedia, this firm started at 2, rue d'Amsterdam, the same address as G Piprot, and was restructured between him and his brother-in-law in 1905.

The IRIS mark was already registered in the 1907 list. IRISA and IRISETTE were added by 1914, plus "as de coeur" and "as de pique" (ace of hearts and ace of spades) logos. By 1922 RP and FURIA had been added and the earlier marks dropped. Two RP cards are shown here with different logos. By 1925 this firm had merged with Papeteries de Levallois-Clichy, which produced PC, REX and other marks. The merged firm continued to produce RP and FURIA cards.

www.cparama.com/forum/les-editeurs-parisiens says: R. P., éditeur à Paris, 159, rue Montmartre. (initiales de R. Pruvost). This may be the previous owner of the RP marque, though that list is only giving publishers which produced views of Paris.

The directories used here are

1907: TOME 2, LE TARIF DES DROITS D'OCTROI DE PARIS
1914: PROFESSIONS DES COMMERÇANTS ET INDUSTRIELS DE LA VILLE DE PARIS
1922: ANNUAIRE du COMMERCE DIDOT-BOTTIN 1922 Paris

1907
1914
1922
IRIS 1061
IRISA 2693
IRISETTE 1692
(Heart) 1216
RP Paris 1307
RP 1393, posted 1923
Furia 446