| Business | Phone |
| Osr Medical 1400 Rue Sauve O, Montreal H4N 1C5 | (514) 332-6387 |
| Oxyfil Inc 3285 Boul Cavendish #568, Montreal H4B 2L9 | (514) 485-1880 |
| Oxymed 9592 Rue Berri, Montreal H2M 1R4 | (514) 389-8245 |
| Servoxy 5115 Av Trans Island, Montreal H3W 2Z9 | (514) 481-4462 |